This is another series of shots of one of the truly great mosques in Bursa the Yesil or Green (1424) Mosque. It has a wealth of great tiles and carving, apart from just being good architecture.I visited the mosque once again in December 2006. I used flash to bring out more natural colours on the great tilework. Reflection caused some trouble, overall I think the result is acceptable.'

Details of the decoration on the front. I am not quite certain about this case, but often the pillars on either side of this outside-mihrab can turn. If they do not turn any more, an earthquake is the probable cause. So: early seismometers.

On the picture: One out of two outer mihrabs (prayer niche) in the north facade. Their presence is related to the porch (gallery) that had been planned, but was never built, because Mehmet I died before the work was begun.
The porch was intended to be the ‘son cemaat yeri’ of the mosque (= ‘area for those who came late’), where worshippers who reached the mosque late or at the last moment, will gather and fulfill their prayer duty. The presence of secondary mihrabs makes those worshippers feel more connected to the congregation inside.

Correspondent: J.M.Criel, Antwerpen.
Sources: ‘Vakıf Abideler ve eski Eserler’ - Vakıflar Genel Müdürlüğü III, Ankara 1983 - Wikipedia,