Aya Triada, also known as the Church of the Holy Trinity, is a significant Greek Orthodox church located in the Beyoğlu district of Istanbul. Completed in 1880, it stands as a remarkable example of Byzantine Revival architecture. The church is known for its large dome, grand arches, and intricate stonework, which create an imposing yet elegant exterior. Inside, visitors can admire beautiful frescoes and detailed woodwork that adorn the walls and ceilings. Aya Triada plays an essential role in the spiritual life of Istanbul’s Greek Orthodox community and is a key cultural landmark. The church’s serene atmosphere and historical significance attract both religious pilgrims and tourists. Today, it continues to host religious services and cultural events, standing as a symbol of the city’s religious diversity and historical depth.