Mudanya Halil Ağa Mosque (Old Mosque)
It is written in the two-line inscription on the entrance gate of Halil Ağa Mosque that it was built by Kethüda Halil Efendi in 1643-1644. The mosque has a square plan, is covered with a dome and is made of rubble stone and brick. It attracts attention with its handcrafted and wooden decorations inside. Since it is the mosque with the oldest construction date in Mudanya, it is also known as the old mosque by the people of Mudanya.