The Eyüp Sultan Mosque is one of the most sacred Islamic sites in Istanbul, built in 1458 near the burial place of Abu Ayyub al-Ansari, a close companion of Prophet Muhammad. The mosque complex features beautiful Ottoman architecture, a peaceful courtyard, and elaborately decorated interiors. It's a significant pilgrimage site where you can witness local religious traditions and ceremonies. Located at the end of the Golden Horn, the mosque is surrounded by a lively neighborhood with traditional shops and cafes, and the nearby Pierre Loti Hill offers panoramic views of Istanbul.