Built for Mehmet I between 1412 and 1419, Yeşil Camii represents a departure from the previous, Persian-influenced Seljuk architecture. Exemplifying Ottoman stylings, it contains a harmonious facade and beautiful carved marble work around the central doorway. The mosque was named for the interior wall's greenish-blue tiles.

Diverse calligraphy exists on the main door's niches. Entering the ornate interior, you'll pass beneath the hünkar mahfili (sultan's private box) and into a domed central hall with 15m-high mihrab (niche indicating the direction of Mecca). A narrow staircase leads to the sumptuously tiled hünkar mahfili, where the sultan stayed when in town; the harem and household staff enjoyed less plush digs on either side.