Monstrance clock

The Monstrance clock, or mirror clock, developed during the Renaissance. The monstrance was a cross-shaped gold or silver vessel which played an important part in church ritual and often incorporated sacred figures as part of the design. The clock made use of a rotating ball at the top or in the base to indicate the time of day. Monstrance clocks and crucifix clocks remained fashionable until the eighteenth century.^[1]

Pop culture references include the song "Monstrance Clock" by Ghost. The song itself has themes of Satanic Ritual, rather than Renaissance-age Christianity.

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