Ulrich Ensingen
Ulrich Ensingen was a medieval German architect. He conceived the plans for the main spire of the Ulm Minster ; designing the Sondergotik tower, and the west porch, though the upper stages were built by Böblinger. He was also the architect of the elegant octagonal stage of the tower at Strasbourg Cathedral, France, with its cage of intricate tracery.
Later in his life, he worked at the Frauenkirche, Esslingen, and the convent at Pforzheim. He, or his son, also Ulrich, appears to have acted as a consultant at Milan Cathedral in 1394.