Speculum Alchemiae: Inside Prague's Alchemy Workshop Museum

The Discovery After the 2002 Flood

In 2002 the Vltava flooded Prague and forced roughly 50,000 people out of the Old Town according to one guide. When the water dropped, renovation work began on the house called U Rabbiho Loewa at Haštalská 1, and workers found an alchemist's workshop.

The find turned into a museum. Speculum Alchemiae means Mirror of Alchemy, and the name fits the site's long history. The museum's own timeline records that the first written reference to buildings here dates to 900 AD, which would make it one of the oldest building sites in Prague. A 1412 record prices the house at 30 groschen. By the 15th century a herbal pharmacy operated in the building, and the museum says Rudolf II set up an alchemical laboratory here in the 16th century.

A 1591 written record lists miraculous ointments and potions sold in the house. Whether that is marketing or fact from 400 years ago, it is the kind of paper trail that makes this stop different from a reconstructed attraction. The workshop was really here.

A House That Should Not Have Survived

The building has been through a lot. The 1689 fire burned the whole Jewish ghetto and damaged the house, which was then rebuilt in baroque style. When most of the old Jewish quarter was demolished between 1893 and 1913 in a Paris-style modernisation, the house was one of the few that survived. The museum notes that nobody has explained why it was spared.

That survival left one of the oldest historical buildings in Prague standing at Haštalská 1, in the Old Town. If you are planning a day around the Jewish quarter, the museum pairs well with the Old Jewish Cemetery Prague, since the house's own name ties it to Rabbi Loew, the scholar linked in legend to the Golem of Prague.

Czech press quoted on the museum's site even claims this is where the Golem got his shem, the tablet that animated him, and that the elixir of eternal youth was brewed here from 77 herbs. Treat both as good stories. The workshop is real. The elixir is not.

The Tunnels and the Goat Carriage

The museum says tunnels beneath the house connect Prague Castle, the Old Town Hall and the Barracks. Two things to know before you go. First, a visitor guide reports the passages are closed and inaccessible for safety reasons, and the tour covers the workshop, the laboratory and the catacombs area. Second, the tunnel network is the museum's account of what lies below, not a route you can walk.

Prague's Old Town does have real medieval underground, and if walking under the city matters to you, the ghosts, legends and underground tour at $30.92 includes a medieval underground and a dungeon, and the medieval underground tour of the Old Town Hall at $28 covers two undergrounds with a licensed guide.

The house also has its own ghost story. Local legend says a flaming carriage drawn by goats appears at midnight in front of the house. The legend is old enough that the museum's timeline records a 1579 description of a stinking fire carriage drawn by goats near the house, which may be where the story started. The goat carriage is also tied to Haštalská street itself in Prague ghost lore, so you are standing on haunted ground by local reckoning.

Why Prague Became the City of Alchemists

Alchemy in Prague is not a tourist invention. Rudolf II moved the imperial court to the city in 1583 and reigned as Holy Roman Emperor from 1576 until his death on 20 January 1612. He brought alchemists including Edward Kelley and John Dee to his court and kept a private laboratory of his own. He also supported the astronomers Tycho Brahe and Johannes Kepler, and Tycho is buried in Týn Church on Old Town Square.

Kelley is the figure behind much of the alchemy tourism. A man from Worcester, born on 1 August 1555, he worked with John Dee from 1582 to 1589 as his scryer, claiming angels revealed the Enochian language to him. Dee and Kelley had audiences with Rudolf II at Prague Castle. Rudolf later imprisoned Kelley, first at Křivoklát Castle in May 1591 and later at Hněvín Castle in Most, where Kelley died in 1597 or 1598. Legend adds that Kelley had his ears cropped as punishment and wore a cap to hide it.

So when people ask why Prague is known for alchemy, the honest answer is that an emperor obsessed with the art hosted the most famous alchemists in Europe, and parts of that world, like a workshop under Haštalská 1, still turn up when the city digs.

Speculum Alchemiae Prices

The figures below come from prague.eu and the museum's own site, which agree on the main tickets. Adults pay 200 CZK. Students under 26 and seniors 65 plus pay 150 CZK. The children's line is where the two sources differ, Prague.eu and the museum list different children's lines, so none is printed here. A family ticket for two adults and two children under 15 costs 500 CZK according to the museum. Large groups can negotiate special offers with the museum. The shop sells herbal potions and elixirs if you want a souvenir with a story attached.

Note the honest limits. The visit is 30 minutes, the tunnels are closed, and you are paying for a guided look at one alchemist workshop and laboratory, not a full museum wing. For the price it is good value, but go in knowing the size.

Ticket Table

Every figure below is in Czech crowns, as listed on prague.eu and the museum's own contact page. The family ticket covers two adults and two children under 15.

Hours, Tour Length and Languages

The museum is open Monday to Sunday from 10:00 to 18:00. Tours start every half hour, each one lasts 30 minutes, and you will be taken through the alchemist workshop, the laboratory and the catacombs area with a guide. Entry is behind a bookshelf, and a narrow staircase leads down to the lab, where you will see distillation apparatus and a stone furnace.

Guides speak English and Czech. Other languages should be checked when booking. Prague.eu notes that Czech-language tours should be booked in advance. Contact the museum on +420 773 645 234 or at info@alchemiae.cz if you want to confirm a slot.

The museum also offered a Magical Triangle bus and walking tour linking the House of Rabbi Loew, Vyšehrad and Prague Castle, lasting 3 to 4 hours at 1,700 CZK with at least 10 participants, starting at Haštalská 1 at 13:00 on scheduled Saturdays. Caution: the dates on that page were from 2019, so check with the museum before counting on it.

Is There a Second Alchemy Museum?

Yes, and people mix them up constantly. The Museum of Alchemists and Magicians of Old Prague sits at Jánský vršek 8 in Malá Strana, in the House at the Donkey in the Cradle where Edward Kelley is said to have lived his last three years. It opens daily 10:00 to 20:00. It has a ground floor exhibition covering Rudolf II, other alchemists and Doctor Faustus, a basement laboratory with interactive cauldrons, and 60 wooden stairs up to Kelley's attic laboratory. Ticket holders get a 20 percent discount at the Kellyxír pub. Sources disagree on the price, so check the museum before you go.

If you want Kelley's story walked rather than read, two evening tours cover his ground. The alchemy legends and mysteries walk of Malá Strana at $20.61 passes Tycho Brahe's residence and Kelley's alchemy laboratory tower on Nový Svět and Malá Strana in 105 minutes. The castle district alchemy walk at $20.61 starts at the Pohořelec tram stop with a lantern-carrying guide and covers about 2.8 km of hidden corners. The alchemy and mysteries of Prague Castle tour at $32.07 runs 3 hours around the castle and Golden Lane, exteriors only. And the ghost walk with a museum ticket option at $26 lets you add entry to the Malá Strana museum to an Old Town walk.

For Rudolf's castle itself, Golden Lane Prague covers the lane where castle guards and goldsmiths lived, though the alchemists worked elsewhere in the castle area.

Kelley's House on Jánský Vršek

The Museum of Alchemists and Magicians of Old Prague stands at Jánský vršek 8 in Malá Strana, inside a building called the House at the Donkey in the Cradle. The museum says Kelley lived there for the last three years of his life. The Jánský vršek street has its own ghost story. The legend says a flaming headless skeleton drives a black coach through the street every Friday at midnight and sinks into the ground after an hour.

If you want the full Kelley story out loud rather than on a wall panel, the evening walk Prague Alchemy Legends and Mysteries Walking Tour at $20.61 passes his laboratory tower in Malá Strana.

What Is Inside

The museum has three parts. The ground floor holds an exhibition on alchemy in Prague, covering Rudolf II, other alchemists and Doctor Faustus. Prague.eu describes a basement laboratory with an interactive display of alchemical cauldrons. Then there are the 60 wooden stairs, which the museum says Kelley designed himself, leading up to a reconstruction of his attic laboratory. A pub called the Kellyxír completes the three parts, and museum ticket holders get a 20 percent discount there.

Unlike the 30 minute guided tour at Speculum Alchemiae, this museum is not described as a timed tour on the sources read, so check how the visit runs.

Hours and Admission

The museum opens daily from 10:00 to 20:00. Sources disagree on admission, so check the museum directly before you go, either on its site or on +420 277 016 844. The same operator, Mysteria Pragensia, also runs the Museum of Prague Ghosts and Legends, if you want a second indoor stop on a rainy day.

Rudolf II and His Court

Rudolf II moved the imperial court to Prague in 1583 and reigned as Holy Roman Emperor from 1576 until his death on 20 January 1612. He brought alchemists including Edward Kelley and John Dee to his court and kept a private laboratory of his own. His Kunstkammer at Prague Castle, described as unrivalled north of the Alps, held astronomical instruments, natural specimens, artworks and mechanical devices, and Rudolf kept it in the new north wing where the Spanish Hall now stands. He also supported the astronomers Tycho Brahe and Johannes Kepler and patronised the painter Giuseppe Arcimboldo.

In 1611 his brother Matthias forced him to give up the Bohemian crown and held him in Prague Castle. He died the next year. The Swedish army looted his art collection from the castle during the battle of Prague in 1648, and a Swedish inventory counted 472 paintings brought from Prague by 1652.

Kelley, Dee and the Angels

Edward Kelley was born on 1 August 1555 in Worcester and worked with John Dee from 1582 to 1589 as Dee's scryer, the man who read the crystals. He is said to have had both ears cropped as punishment and wore a cap to hide it. Kelley and Dee reached Central Europe in September 1583 together with Albert Łaski, and the two had audiences with Rudolf II in Prague Castle.

Kelley claimed his first alchemical transmutation at Třeboň on 19 December 1586. In 1587 he told Dee an angel ordered the two men to share everything, including their wives. Dee left Bohemia and returned to England in 1589, finding his Mortlake library vandalised.

Kelley stayed in Rudolf's service. The emperor knighted him and later imprisoned him at Křivoklát in May 1591. He is remembered for the Enochian language he said angels revealed.

Tycho Brahe and Kepler

Tycho Brahe died in Prague on 24 October 1601 at the age of 54. Kepler recorded that Tycho held back from leaving a banquet to relieve himself out of etiquette and died eleven days after the onset of urinary trouble. Czech and Danish researchers working from 2010 to 2012 tested the Mercury in his remains and concluded the levels were too low for poisoning and that murder was impossible.

You can visit his grave. Tycho is buried in the Church of Our Lady before Týn on Old Town Square, where his 1601 tombstone sits at the first southern pillar of the nave. A local guide also places his residence at the house U Zlatého noha on Nový Svět street in Hradčany, the same street the alchemy walk Prague Alchemy Legends and Mysteries Walking Tour at $20.61 passes.

The Names Behind the Legend

The table below pulls together the dates the sources give for the men who made Prague an alchemical capital. Use it to fix the order of events: the court arrives, the Englishmen follow, the astronomers finish the work.

Comparing the Alchemy Walks

The table compares the bookable alchemy walks by price, length and meeting point, using the prices and durations from the operators' own listings. The Prague Castle walk and the castle district walk both state that no interiors are included, and the Malá Strana walk lists no entry either. None of them includes a Speculum Alchemiae ticket or any museum entry.

Which One Fits Your Evening

The 3 hour Alchemy and Mysteries of Prague Castle Walking Tour at $32.07 takes groups of up to 30 around the castle and the Golden Lane, with stories of Rudolf II, the Golem and the Codex Gigas. Children up to 6 go free and the tram ticket is not included. The 105 minute Prague Alchemy Legends and Mysteries Walking Tour at $20.61 is the strongest rated of the three at 5.0 from 318 reviews. It runs in English only through Nový Svět and Malá Strana, past Tycho Brahe's residence and Edward Kelley's alchemy laboratory tower, and the price includes a 30 minute public transport ticket. Groups cap at 32.

The 90 minute Mysteries and Alchemy at Prague Castle Myths and Legends at $20.61 starts at the Pohořelec tram stop in front of the statue of Tycho Brahe and Johannes Kepler, and covers about 2.8 km through the castle district with a lantern-carrying guide in a gothic outfit. Its tram ticket is included. None of the listings states fixed start times in the listing text, so the departure times show when you check availability for your date.

A Ghost Walk With a Museum Ticket

One Old Town walk ties the two halves of this page together. Prague Ghost Walking Tour Where Legends Come To Life costs $26 and runs 1.5 hours from the Charles Bridge side to Old Town Square, with live ghost characters along the route. On its plain group options no entry is included. But the listing sells a museum option that bundles an entry ticket to the Museum of Alchemists and Magicians of Old Prague with the walk, so you can hear the legends after dark and visit Kelley's museum on one booking.

The tour is the most reviewed ghost walk in the comparison, with 5,682 reviews at 4.5, and it runs in six languages.

Ticket

The table sets each sight's official adult price beside a link to book the entry online. Reduced and family rates still apply at the gate where the site offers them, so check them before you pay.