One of the earliest examples of Ottoman architecture, the Yeşil Mosque was constructed by order of the Grand Vizier Çandarlı Kara Halil Hayreddin Pasha of Sultan Murad I in Iznik.

The Yeşil Mosque is located near the Lefke Gate on the eastern edge of the city.

The height of the dome is 17.5 m (57 ft) above the floor, it has four windows and the lower portion of the interior walls are coated with gray marble panels.

The mosque has a single minaret in the northwestern corner of the building which is decorated with composed glazed terra-cotta green, yellow, turquoise and dark purple coloured tiles.

The colourful tiles minaret gives the mosque its name: Yeşil (green in Turkish).