sentences:  The ambulatory has a series of radiant chapels illuminated with large windows, contrasting with the dark Romanesque nave of the cathedral.An important transitional building is Évora Cathedral, built during the 13th century; even though its floorplan, façade and elevation are inspired by Lisbon Cathedral, its forms (arches, windows, vaults) are already Gothic.Many Gothic churches maintained the fortress-like appearance of Romanesque times, like the already-mentioned Évora Cathedral, the Church of the Monastery of Leça do Balio (14th century) near Matosinhos, and even as late as the 15th-century, with the Main Church of Viana do Castelo.