Discover one of Istanbul’s lesser-known yet historically significant sites: the Theodosius Cistern. Often overshadowed by the Basilica Cistern, the Theodosius Cistern—locally known as the Serefiye Sarnici—offers a unique glimpse into the city’s Byzantine past. With a history spanning 1,500 years and recent restoration, this subterranean marvel is well worth a visit. In this guide, we’ll cover its history, entrance fees, opening hours, and what to expect from this underground treasure.

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The Origins of the Theodosius Cistern

The Şerefiye Cistern, also known as the Theodosius Cistern, was constructed between 428 and 443 AD by the order of Emperor Theodosius, after whom it is named. It is one of the three major cisterns of ancient Constantinople, along with the 4th-century Binbirdirek Cistern and the 6th-century Basilica Cistern. The cistern was a crucial part of the city’s water system, supplied by the Aqueduct of Valens, which brought water from the Belgrade Forest.

Due to a scarcity of natural water sources in the area, the Byzantines built numerous cisterns like this one to collect and store rainwater. The stored water was reserved for emergencies, such as droughts or sieges. The Şerefiye Cistern is constructed from brick, local limestone, and hydraulic mortar, and measures approximately 24 by 40 meters. Its roof is supported by 32 marble columns topped with Corinthian-style capitals. After a thorough restoration, the cistern has been opened to the public as a museum, offering a glimpse into the city’s rich Byzantine history.

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Rediscovery of the Theodosius Cistern

In 2010, the Theodosius Cistern (Şerefiye Sarnıcı) was rediscovered when the old Eminönü Town Hall was demolished. This 5th-century cistern, hidden for centuries, was carefully restored and opened to the public in 2018. A modern steel and glass structure, designed by the Istanbul-based firm Cafer Bozkurt Mimarlık, was added above the ancient site, creating a unique blend of old and new.

Today, the cistern is more than just a historical site—it’s a lively cultural venue hosting art exhibitions, cultural events, and free classical music concerts. Visitors can also relax at the bookstore and coffee shop above the cistern, making it a great spot to take a break while exploring Istanbul.

What to See in Theodosius Cistern

Byzantine Architecture

The Theodosius Cistern features an impressive architectural design, with 45 sail vaults supported by 32 marble columns. Each column is adorned with intricate Corinthian capitals, showcasing the masterful craftsmanship of the Byzantine era.

Marble Columns

The Theodosius Cistern is supported by tall marble columns that stretch up to the roof. These ancient columns are decorated with intricate designs that showcase the incredible craftsmanship of the builders from centuries ago.

Ancient Inscriptions

While the Theodosius Cistern does not have its own inscriptions, its architectural characteristics suggest that it was built during the rule of Theodosius II (408-450).

Enjoy Free Entry to the Theodosius Cistern and Guided Tour with Istanbul E-Pass

The Istanbul E-Pass is an option for travelers, as it offers free entry and guided tours to the Theodosius Cistern, along with 50+ other attractions, providing a cost-effective way to explore the city.

Cistern Concerts

The Theodosius Cistern also hosts periodic concerts, showcasing classical Turkish music, classical Western music, and baroque music.

Theodosius Cistern vs Basilica Cistern

The Theodosius Cistern, known in Turkish as Şerefiye Sarnıcı (Goodwill Cistern), is smaller and rectangular, measuring about 42 meters long and 25 meters wide. In contrast, the Basilica Cistern is much larger, spanning 138 meters by 65 meters. While the Basilica Cistern is grand and expansive, the Theodosius Cistern provides a more intimate glimpse into Istanbul’s ancient water system.

More Byzantine Cisterns in Istanbul

In addition to the Theodosius Cistern, Istanbul have several other impressive Byzantine cisterns that are worth exploring.

Basilica Cistern (Yerebatan Sarnıcı)

The Basilica Cistern, also known as the Yerebatan Sarnıcı, is the largest and most famous cistern in Istanbul. With its forest of 336 marble columns. Read more…

Binbirdirek Cistern (Binbirdirek Sarnıcı)

The Binbirdirek Cistern, also known as the Cistern of 1,001 Columns, is the second-largest cistern in Istanbul. It features 224 marble columns and was once part of the Great Palace complex.

Cistern of Philoxenos (Mocius Cistern, 1001 Direk Sarnıcı)

The Cistern of Philoxenos is a lesser-known cistern that was constructed during the reign of Emperor Justinian. It is also called the Mocius Cistern or the 1001 Columns Cistern, although it only contains 224 columns.

Aetius Cistern (Aetius Sarnıcı)

The Aetius Cistern is another hidden gem of Istanbul, built during the reign of Emperor Justinian I. This cistern has a simple design, featuring 32 columns arranged in four rows.

Aspar Cistern (Aspar Sarnıcı)

The Aspar Cistern is one of the oldest and largest open-air cisterns in Istanbul, built during the reign of Emperor Leo I. Named after the Eastern Roman general Ardabur Aspar, this cistern once supplied water to the Great Palace and the Hippodrome.

Visitor Information

• 💵

  Entrance Fee: 650 TL

• ⌛Opening Hours: from 09:00 to 19:00

• ⛔

  Closed: No

• 📍

  Location: Binbirdirek, Piyer Loti Cd. No:2/1, 34122 Fatih/İstanbul

FAQs

Q: How many cisterns were in Constantinople?

A: Tens of cisterns were built in Constantinople over the centuries to address the city’s water shortages. Some of the most famous ones include the Basilica Cistern and the Theodosius Cistern.

Q: What is a cistern?

A: A cistern is an underground chamber designed to store and hold water, often built in areas with limited water resources or to ensure a water supply during sieges.

Q: Is the Theodosius Cistern worth visiting compared to the more famous Basilica Cistern?

A: Yes, the Theodosius Cistern offers a unique experience with its 360° projection mapping system, periodic concerts, and well-preserved architectural details.

Q: Can I take photos inside the Theodosius Cistern?

A: Yes, visitors are allowed to take photos inside the cistern, capturing its stunning architecture and mesmerizing light show.

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