The Eyüp Sultan Mosque is a significant mosque located in the Eyüp district of Istanbul, Turkey. It was built in the 15th century and is named after Abu Ayyub al-Ansari, a companion of the Prophet Muhammad. The mosque is known for its beautiful architecture and serene atmosphere, making it a popular site for both worship and tourism. The mosque complex includes a tomb, a fountain, and a courtyard, attracting many visitors each year. It holds great importance in Islamic culture and is considered a pilgrimage site. The surrounding area features cafes and shops, enhancing the experience for those who visit.