Prague Part 6: A Monument to Science and Culture in the Heart of Prague – Klementinum Library and Astronomical Clock
- Pelin YÜCE
- Dec 10, 2024
- 3 min read
In the final installment of my articles about Prague, I’ll be sharing a place that left a deep impression on me and that I strongly recommend you visit: the Klementinum Library and Astronomical Clock.
Prague is renowned for its captivating architecture, rich history, and cultural treasures in Central Europe. One of these treasures is the Klementinum, or Clementinum complex. The Klementinum is far more than just a library or an astronomical clock; it stands as a nexus of science, art, and history, making it one of Prague’s most iconic symbols.

The History of Klementinum
The Klementinum was established in the 16th century by the Jesuit order and expanded over time. Initially founded as a Jesuit college, it became the intellectual hub of Prague. Following the expulsion of the Jesuits from Europe in 1773, the Klementinum was opened to the public during the Habsburg Empire era and transformed into the Czech National Library. Today, it is considered one of Europe’s most beautiful historical libraries.
The Klementinum Library
The library of the Klementinum is renowned for its Baroque architecture, which captivates visitors the moment they step inside. Opened in 1722, the library houses one of Europe’s oldest and richest collections of books.
The ceiling of the library, adorned with frescoes by artist Jan Hiebl, is particularly striking. These frescoes reflect themes of science, religion, and art, embodying Baroque aesthetics. The original wooden bookshelves are intricately carved and embellished with golden details. Baroque-era globes and astronomical instruments highlight the library's role as a hub for scientific studies.

The library contains approximately 20,000 rare works, including religious texts, first-edition scientific books, and maps. It is believed that legendary artifacts such as the Codex Gigas (Devil’s Bible) were once housed here..
The Klementinum Astronomical Clock
The Klementinum is not just a library but also a landmark in the history of science, featuring an observatory that has left its mark on the scientific world. The astronomical clock within the complex stands out for its scientific significance and aesthetic beauty.
The Klementinum’s astronomical clock was established in 1722. While it may not be as famous as the astronomical clock in Prague’s Old Town Square, it holds greater scientific importance. Designed to measure not only the time but also the days of the year, lunar phases, and the movements of the sun, it is an impressive feat of engineering.

The observatory at the Klementinum was modernized in 1751 by astronomer Antonín Strnad. At one time, it served as the official center for time measurement in Europe. Since 1775, the Klementinum has conducted regular meteorological observations, and today, it provides some of Europe’s oldest meteorological records.
Today, the Klementinum is not only a cultural landmark but also a must-visit destination for tourists in Prague. Visitors can only explore the Baroque Library through guided tours, which allow you to admire the intricate details of the frescoes up close.
It’s worth noting that photography is only allowed in the entrance area, and access to the library’s interior is not permitted. Despite this, the stunning view of the library will make you reluctant to leave. Additionally, climbing the tower offers breathtaking views of Prague’s unique landscape and the enchanting beauty of the Vltava River. As part of the guided tour, the final segment takes you to the terrace, where you can soak in unparalleled views of Prague’s skyline.

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