A beautiful and picturesque church converted into a mosque and later into a museum that still has stunning frescoes within—just like its namesake in Istanbul. The portico on the south side of the church has a freeze running above an arch that rests on two Corinthian columns, which were probably part of a previous classical temple at the site. The columns in the western portico leading to the narthex, however, are styled with muqarnas, showing eastern Anatolian influences. The use of arches, freezes and muqarnas is atypical for Byzantine churches. The church has a freestanding square bell tower, which is unique among churches of the Black Sea region. It houses a small chapel on its second floor. Invisible from its exterior, the internal walls of the bell tower are covered in frescoes. There is a peaceful open-air tea garden on the grounds. Just north of the church the foundation of a previous chapel can be seen. While the main hall of the church was converted into a mosque in 2013 (its legal status is still under debate), all of the best preserved frescoes are still visible in the narthex. In December 2017 it was announced that the building will be renovated again, making all the frescoes and Opus Sectile floor mosaics visible to tourists.