In medieval Spain (both Al-Andalus and the Christian kingdoms), a host of synagogues were built, and it was usual to commission them from Moorish and later Mudéjar architects. Very few of these medieval synagogues, built with Moorish techniques and style, are conserved. The two best known Spanish synagogues are in Toledo, one known as El Tránsito, the other as Santa María la Blanca, and are now preserved as national monuments. The former is a small building containing very rich decorations; the latter is especially noteworthy. It is based upon Almohad style and contains long rows of octagonal columns with curiously carved capitals, from which spring Moorish arches supporting the roof.