The document outlines three major architectural styles that were prominent in Europe during the Middle Ages: the Islamic style which featured horseshoe arches, domes, mosaics and bright colors with balanced proportions; the Gothic style from the 13th to 16th century with large stained glass windows depicting Bible scenes, pointed arches, thin walls and tall structures; and the Romanesque style from the 11th to 12th century characterized by small windows, rounded arches, thick walls and low structures. It also mentions the Mudejar style which was a mixture of Islamic, Gothic and Romanesque influences.