Yakov Grigorievich Bukhvostov (Russian: Яков Григорьевич Бухвостов), a serf of Russian boyar Mikhail Tatishchev, designed the so-called "octagon on cube" churches in the Naryshkin Baroque mode. He was active in the 1690s in Moscow and Ryazan, where he supervised the construction of the new in the kremlin. His tower churches in and "may owe something to prototypes in wooden Russian architecture". They are built of brick and decorated with profuse white stone ornamentation. A soaring white tower in front of New Jerusalem Monastery was also built from Bukhvostov's designs. Other buildings attributed to him include the Fili and churches. Some of the attributions are far fetched, since "there is documentary evidence of his being in charge of constructing only a handful of buildings".