OTTONIAN ARCHITECTURE - St Michael at Hildesheim, 1001-1033 It is one of the most important churches of Ottonian times (Early-Romanesque) style. Ottonian architecture was more regulated than Carolingian, with simple interior spaces and a more systematic layout. St. Michael’s, Hildesheim, exemplifies this regularity, with two crypts, two apses, and two transepts, each with a crossing tower.