Klementinum Astronomical Tower rising above Prague's historic Baroque architecture and terracotta rooftops

Baroque Splendor Above Prague

Climb the Astronomical Tower for panoramic views across the city's red rooftops and the Vltava River below.

See ticket options
  • UNESCO Historic Centre of Prague
  • 20,000 m² Prague's 2nd-largest historic complex
  • 1709–1726 Main Baroque construction
  • 50 min Standard guided tour

Choose your ticket

Youth (16–26)

Live availability

Ages 16–26 · valid photo ID showing age

€30

  • Full guided route (same as adult tour)
  • Skip-the-line priority queue
  • Audio history sent before your visit
Reserve youth ticket

Senior (65+)

Live availability

Ages 65+ · valid photo ID showing age

€24

  • Full guided route (same as adult tour)
  • Skip-the-line priority queue
  • Audio history sent before your visit
Reserve senior ticket

Junior (6–15)

Live availability

Ages 6–15 · must be accompanied by an adult

€24

  • Full guided route (same as adult tour)
  • Skip-the-line priority queue
  • Audio history sent before your visit
Reserve junior ticket

Family

Live availability

2 adults + up to 4 children (6–15)

€76

  • Full guided route for family
  • Skip-the-line priority queue
  • Audio history sent before your visit
  • One reservation covers the whole family
Reserve family tour
  • Book in your languageYour currency, final price.
  • Pro tips includedBest times, secret spots, the room most miss.
  • Ready before you flyMobile ticket, ready in your inbox.
  • 24/7 human supportReal people, instant answers — any hour, any time zone.
4.8 from 75 verified travellers
Min-jun K.
Seoul, South Korea
“The Baroque Library is everything they say — we'd booked the 11am English tour and there were only 12 of us. Could actually hear the guide explaining the Hiebl ceiling.”
March 2026
Marcus D.
Dublin, Ireland
“Tower view at the end of the tour was a complete surprise — better than the Old Town Hall view in my opinion. The Charles Bridge angle is closer.”
February 2026
Hannah B.
Manchester, UK
“Tour starts on time and they don't admit latecomers — the team's reminder email made that crystal clear, so we arrived 10 minutes early like they suggested.”
May 2026

5-minute audio guide

Your Klementinum Library 5-minute guide

Hand-written, narrated by a heritage host. Five minutes that take you through the most beautiful library hall in Europe — Hiebl's painted ceiling, the Jesuit globes, and the Astronomical Tower that once set the time for all of Prague.

Included with your booking — your full guide arrives with your ticket.Get your guide
  • How the Jesuits stitched a city together over 150 years
  • Hiebl's trompe-l'oeil Temple of Wisdom on the ceiling
  • The brass meridian line and the red noon flag
  • The view from the top of the Astronomical Tower

Included free with every ticket. No app, no download — plays in any browser.

About Klementinum

The Klementinum stands in Prague's Old Town as one of Europe's largest Jesuit complexes, a sprawling Baroque compound that once served as a college, library, and observatory. Today it houses the Czech National Library and opens select halls to visitors. You smell old paper and polished wood the moment you step through the gate.

The main Baroque construction took place from 1709 to 1726 under Jesuit direction. The complex occupies over two hectares and contains multiple courtyards, chapels, and the famous Astronomical Tower that rises above the red rooftops of Malá Strana.

You climb the narrow spiral staircase of the tower, passing frescoed ceilings and antique instruments still mounted in glass cases. At the top, Prague unfolds in all directions—the Vltava curves below, the Castle looms west, and the city's spires puncture the skyline. The Baroque Library Hall gleams with ceiling frescoes and floor-to-ceiling walnut shelves.

Practical information

Opening hours
Guided tours daily 10:00–18:00 (last departure 17:30, varies seasonally). Closed on selected major holidays.
Address
Mariánské náměstí 5, 110 00 Prague 1, Czech Republic
Getting there
Metro line A to Staroměstská (3-min walk). Tram 17, 18 stop at Karlovy lázně (5 min on foot).
Accessibility
The Astronomical Tower is reached only by a spiral staircase; the Library Hall is viewed from the doorway (no interior access for any visitor).
Photography
Photography rules announced at the start of each tour — some rooms restricted to protect rare manuscripts. Bag policy: Small bags only; backpacks must be checked.

About our service

Klementinum Tickets acts as a facilitator to assist international visitors in purchasing skip-the-line tickets directly from the official operator. We do not resell tickets — we provide a personalised booking and support service in your own language. Our concierge service fee is included in the displayed price.

Frequently asked

How far in advance can I book a Klementinum tour?

The official operator only releases each Klementinum tour date up to about 14 days ahead — you won't see dates further out than roughly two weeks, and new dates are added daily as the window rolls forward. If your travel date is still beyond that window, reserve it on our site (or email [email protected]) and we'll watch the calendar for you. The moment the operator opens a session that matches your date, we email you a secure payment link. We refresh our availability feed every 30 minutes, so we catch new dates within half an hour of release — which matters, because the small English-language groups often sell out within hours.

Why is my preferred date not showing as bookable?

Two reasons most often: (1) your date is outside the operator's current 2–3 week release window — check back, or email us to be notified when it opens. (2) the session sold out — Klementinum tours cap at around 15 visitors per session, and English-language sessions can sell out 7–10 days ahead in peak summer. We can suggest a Czech-language session at the same time slot if you don't mind the language; the building, the route, and the upper-terrace views are identical.

What is your refund policy?

All sales are final. A refund is issued only if the operator cancels the tour. Once your booking is confirmed, changes to date or time follow our rebooking terms.

Can I change my visit date after booking?

Yes. We rebook your visit to any open slot in the operator's calendar. Submit your request at least 48 hours before your original time slot. The concierge team coordinates directly with the Klementinum to find availability that suits your revised schedule.

How quickly will I receive confirmation?

Confirmed within 2 hours during business hours. You receive a confirmation email with your visit details and entry instructions. Tickets are digital, instant, by email. Check your inbox and spam folder; contact the concierge team immediately if nothing arrives within the window.

Where do I meet for the tour?

The main entrance is on Mariánské náměstí. Arrive ten minutes early. Your confirmation email includes the exact address, a map pin, and instructions for locating the guide. The tour departs on time; late arrivals cannot join mid-visit due to security protocols.

What is included in my ticket?

Your concierge tier covers the standard Baroque Library Hall + Astronomical Tower route. Your concierge tier covers entry, the guided route, and access to all public exhibition spaces. Photography rules and restrictions are explained at the start of your visit.

Is the Klementinum wheelchair accessible?

The historic structure includes narrow staircases and uneven surfaces. Contact the concierge team before booking if you require mobility accommodations; we coordinate with the operator to clarify which sections you can access and arrange assistance where possible.

Can children visit the Klementinum?

Children are welcome. The tour involves climbing stairs and listening to detailed historical commentary, so families with very young children should assess whether the format suits their group. Strollers cannot be used inside; carriers are recommended for infants.

Am I allowed to take photographs?

Photography rules are announced at the beginning of your visit. Some rooms permit non-flash personal photos; others prohibit all photography to protect rare manuscripts and instruments. Respect the guide's instructions and posted signage throughout the tour.

What happens if the weather is bad?

The Klementinum is an indoor attraction. Rain, wind, and cold do not affect your visit. Dress comfortably for interior temperatures; the historic building may feel cooler than modern spaces, especially in winter months.

How long does the visit last?

The standard tour lasts 50 minutes. Plan for the full duration plus travel time to and from your accommodation. The tour follows a set route and pace; you cannot leave early and re-enter. Arrive rested and ready to climb stairs and absorb detailed historical context.

Do I need to print my ticket?

No. Your ticket is digital, instant, by email. Show the confirmation on your phone at the meeting point. Ensure your device is charged and the screen brightness is high enough for the staff to scan or read your booking reference quickly.

Can I book for a large group?

For parties larger than the standard capacity, contact the concierge team before booking. We coordinate with the operator to arrange private slots or split your group across consecutive time windows, ensuring everyone experiences the tour without crowding.

What should I bring?

Bring your phone with the confirmation email, a valid ID, comfortable shoes for climbing stairs, and a light jacket if visiting in cooler months. Leave large bags at your hotel; the Klementinum does not offer locker storage. Water bottles are permitted but must remain capped inside exhibition halls.

Is the tour conducted in English?

Confirm language availability in your confirmation email. If you require a specific language, note your preference during checkout; the concierge team requests it from the operator. Not all languages are available at every time slot.

What if I arrive late?

You cannot join the tour after departure. The route is timed, and the group moves through secured spaces that lock behind the guide. Arrive ten minutes early to check in, use restrooms, and gather with your group. Late arrivals forfeit their visit with no refund or rebooking.

What is the Klementinum?

The Klementinum is a vast historic building complex in the Old Town of Prague, in the Czech Republic, occupying around 20,000 square metres and ranking as the city's second-largest complex after Prague Castle. A chapel to Saint Clement stood on the site from the eleventh century, and a medieval Dominican monastery preceded the Jesuit college established here in 1556. The main Baroque construction unfolded between 1709 and 1726, producing the celebrated Baroque Library Hall with its allegorical ceiling fresco of knowledge and learning. The Astronomical Tower rises above the courtyards, and continuous meteorological records have been kept here since 1775, among the longest unbroken series in the world. The Mirror Chapel, with its gilded stucco and mirrored ceiling, completes the ensemble. Today the complex houses the National Library of the Czech Republic, and its principal halls are reached on guided tours only.

How do I get to the Klementinum?

The Klementinum sits in the heart of Prague's Old Town, on the block bounded by Karlova, Křižovnická and Mariánské náměstí streets in Prague 1, close to the eastern end of Charles Bridge. The most convenient approach is the metro: take line A, the green line, to Staroměstská station, then walk roughly four hundred metres south-west towards the river. Trams 17 and 18 also serve Staroměstská, running along the embankment nearby. On foot, the complex is only a few minutes from Old Town Square and the Astronomical Clock, which lie a short distance to the north-east, while Charles Bridge is immediately to the south. Street parking is heavily restricted throughout the historic centre, so public transport or walking is strongly preferred. Entrances open from Karlova street and from Mariánské náměstí, where the ticket courtyard and tour meeting point are found.