French style (13th century) that represents the height of Gothic architecture .
During this period architects became less interested in achieving great size than in decoration, which took such forms as pinnacles, moldings, and especially window tracery . The style's name reflects the radiating character of the rose window . Other features include the thinning of vertical supporting members, the enlargement of windows, and the combination of the triforium gallery and clerestory into one large glazed area, until walls became largely undifferentiated screens of tracery, mullions, and glass. Amiens Cathedral (1220–70) is cited as its earliest manifestation. Especially fine achievements include Notre-Dame de Paris , the church of Saint-Urbain in Troyes (founded 1262), and the extraordinary Sainte-Chapelle, Paris (consecrated 1248), Louis IX's palace chapel. See also cathedral .