Transepts were usually short in early French Gothic architecture, but became longer and were given large rose windows in the Rayonnant period. The choirs became more important. The choir was often flanked by a double disambulatory, which was crowned by a ring of small chapels. In England, transepts were more important, and the floor plans were usually much more complex than in French cathedrals, with the addition of attached Lady Chapels, an octagonal Chapter House, and other structures (See plans of Salisbury Cathedral and York Minster below). This reflected a tendency in France to carry out multiple functions in the same space, while English cathedrals compartmentalised them. This contrast is visible in the difference between Amiens Cathedral, with its minimal transepts and semicircular apse, filled with chapels, on the east end, compared with the double transepts, projecting north porch, and rectangular east end of Salisbury and York.