The Roman Catholic church Saint John the Baptist (French: Église paroissiale Saint-Jean Baptiste), formerly Collegiate church Saint Florentius (Collégiale Saint-Florent) is the main church of the small city of Niederhaslach in Alsace. The building is widely considered one of the finest and most ornate examples of Gothic architecture and Gothic art in the Bas-Rhin departement of France.

Stained glass windows :
Niederhaslach's church prides itself with one of the most complete and well preserved/restored collections of medieval stained glass windows in Alsace after Strasbourg Cathedral. The nave and choir display a large number of windows from the 13th and 14th century, remarkable for their shining nuances of blue and red and the number and variety of represented human figures. They represent the life of Jesus and Mary as well as of John the Baptist. The most famous window, being the most original in its design, is the one showing the predication of John the Baptist, the central figure being displayed life-sized.[8] The façade shows a rose window of the year 1325.
(wikipedia)