This is not the main mosque of the city yet it is the most abundant one. Richly decorated with green-blue tiles that also gave the mosque its name. The portal carvings are outstanding as well. Apart from the mosque, there are also tombs, madrasah, kitchen and bath.
If you are not a Muslim, avoid visiting mosques during prayer times.
Wikipedia https://en.wikipedia.org/wiki/Green_Mosque,_Bursa
Praying times http://www.turkeytravelplanner.com/Religion/prayer_times.html
More info http://www.turkeytravelplanner.com/go/ThraceMarmara/bursa/sights/yesilcami.html
More information at Archnet.org http://archnet.org/library/sites/one-site.jsp?site_id=2883
Address Yeşil Mh., Akyokuş Sk 11-17, 16360 Bursa Province/Bursa, Turkey
Coordinates 40°10'55.884" N 29°4'28.628" E