Yeraltı (Kursunlu) Mosque

vitasuiteskarakoy
Aug 7
2 min read

Among Istanbul’s many historical landmarks, the Yeraltı Mosque (also known as the Kurşunlu Mosque) stands out as a unique and mysterious place of worship. Located in the Karaköy district, this mosque is almost entirely underground and dates back to the Byzantine era. Though not widely known among tourists, this hidden gem offers visitors a truly atmospheric and spiritual experience.

Where Is the Yeraltı Mosque?

The Yeraltı Mosque is situated in Karaköy, on the European side of Istanbul, right next to Galata Bridge. It's only a short walk from the Karaköy ferry terminal, and despite being in the middle of one of the busiest parts of the city, the interior provides a peaceful and serene environment, isolated from the noise outside.

Historical Background

The location of the mosque was originally used during the Byzantine period, possibly as a military dungeon or a cistern. During the Ottoman era, it became known as the Kurşunlu Vault (Kurşunlu Mahzen). In 1752, during the reign of Sultan Mustafa III, it was converted into a place of worship.

The name “Kurşunlu Mosque” refers to the lead-covered domes that were added during restoration. Over the centuries, this mosque became a symbolic place for sailors, soldiers, and those embarking on journeys, who would stop by to pray for protection and safe travels before heading to sea.

Architectural Features

The Yeraltı Mosque is very different from the typical mosques in Istanbul, both in structure and atmosphere. It is built underground and consists of a low-ceilinged, stone chamber supported by massive stone columns. The space is dimly lit, giving it the feel of a crypt or a fortress.

Key architectural features include:

Approximately 12 large stone columns holding up the vaulted ceiling
Low ceilings and a cool, humid atmosphere
A simple mihrab (prayer niche) and minbar (pulpit)
Minimal decoration, preserving the historical character of the stonework

This stark, cavernous interior creates a sense of calm and solemnity that sets it apart from more ornate Ottoman mosques.

A Spiritual and Mysterious Atmosphere

What truly makes the Yeraltı Mosque special is its deeply spiritual and mystical ambiance. For centuries, people have come here to offer prayers, make vows, and seek protection. The silence, cool air, and dim light create an environment that invites reflection and calmness.

Today, the mosque is still actively used for worship, and many believe it carries a kind of spiritual energy. Its association with seafarers and travelers also makes it a symbol of protection and good fortune.

Visitor Tips

Be respectful of the prayer space; silence is expected.
Due to low light, use phones or cameras with good low-light performance if you want to take photos.
After your visit, enjoy a short walk to Galata Bridge or explore nearby landmarks like Camondo Stairs, Bankalar Caddesi (Banks Street), and Arap Mosque.
Entry is free, and visitors are welcome outside of prayer times.

Visiting Hours

The mosque is open daily and can be visited at most hours, except during prayer times. There’s no entrance fee, but modest clothing and quiet behavior are expected, as it is still an active religious site.