The monstrance clock, or mirror clock, is a type of clock that was developed during the

Renaissance The Renaissance ( , ) is a Periodization, period of history and a European cultural movement covering the 15th and 16th centuries. It marked the transition from the Middle Ages to modernity and was characterized by an effort to revive and sur ...

(1300 AD – 1600 AD). It is cross-shaped and typically either gold or silver in colour but can be both. They used to play an important part in church ritual and often incorporated sacred figures as part of the design. Such clocks often used a rotating ball at its top or base to indicate the time of day.

Monstrance A monstrance, also known as an ostensorium (or an ostensory), is a vessel used in Roman Catholic, Old Catholic, High Church Lutheran and Anglican churches for the display on an altar of some object of piety, such as the consecrated Eucharisti ...

clocks and crucifix clocks remained fashionable until the eighteenth century.

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Clock designs {{technology-stub