Orhan Gazi Mosque stands on the other side of Koza Park. Built in 1339 by the second Ottoman ruler Orhan Gazi, the mosque was part of the Orhaniye Complex which also included a medrese, two hammams, an imaret (soup kitchen) and a han, of which only the mosque, a hamam and the han survive today. Burnt down during the Karamanogullari raid in 1413, the mosque was rebuilt in 1417 in stone and brick on a reverse T-plan. As the mosque was originally built without a minaret, one was added on the northeast corner later in the nineteenth century.