The Orhan Mosque in Adapazarı carries a name much older than the building. The account given is that when Konuralp, a companion of Orhan Gazi, took Akyazı and the small castles on either side of the Sakarya, he settled a number of Turkmens in this wooded and well-watered country, a village was founded where the city now stands, and a mosque was built there in Orhan Bey's name. That building fell down in time, and the mosque that carries the name today was built in 1893-94 through the efforts of Nuzhet Pasha, the district governor of Adapazarı, with contributions from local people.

The present mosque was built in the tall-windowed manner of the reign of Abdülhamid II, roofed rather than domed, and is probably larger than the building it replaced; the date 1316/1318 on the minaret records that second construction. The roof is timber under tiles, and there is a single minaret. That minaret collapsed in the earthquake of 1967 and was rebuilt in 1968 by a master called Ali Akyuz of Akyazı, and it was restored again after the earthquake of 1999. The mosque is on Bankalar Caddesi.

Getting there

Access
Two kilometres from the city centre; city transport reaches it.Checked: September 15, 2026

When to go

Climate
Across Sakarya as a whole, monthly mean temperatures run from 6.3 °C in January to 23.6 °C in July; the mean stays between 15 and 25 °C in May, June, July, August, September and October; rainfall is heaviest in December (106 mm) and lightest in August (48 mm). Long-term means for 1951-2025 from the Turkish State Meteorological Service (MGM).Checked: September 22, 2026