They are generally octagonal or circular and domed. The cave veranda has pillars with octagonal shafts and square bases. There is a pool tool feature with triangular, square and octagonal pool tools. Rooms were oval, elliptical or octagonal. The interior is made up of Mudejar brick arches resting on octagonal columns. These stone structures were usually built in circular, square and occasionally octagonal form. The building is 33.45 metres high including its octagonal dome. It is an octagonal building flanked by four octagonal pillars. There is a sixteen-sided ambulatory with a gallery overhead encircling the central octagonal dome. They are solid rings of metal in different cross sections like oval, round, octagonal etc. Only ruins of the baptistery and the octagonal baptismal font remain today. Brunelleschi used more than four million bricks in the construction of the octagonal dome. Klemperer also mentioned octagonal and rhombic rosettes. Several lengths of octagonal shaped fore end and Picatinny accessory rails are available as options. This "cimborio" is a pinnacled, two-storey octagonal richly decorated lantern.