The original medieval clock was heavily damaged during the final days of World War II.
The 1950s redesign was led by artist Karel Svolinský.
The clock mosaic represents the 'Ride of the Kings' and the 'Labor' theme, typical of Socialist Realist mosaics.
It is one of the very few astronomical clocks built based on the heliocentric (Sun-centered) model rather than the geocentric one.
The mechanism includes a miniature 'Worker's Parade' that replaces the traditional religious processional figures.
The clock is embedded directly into the exterior wall of the historic Town Hall building.
The dial represents the sky and earth, designed to function accurately while maintaining its unique ideological aesthetic.
The Olomouc Astronomical Clock is one of the few surviving examples of heliocentric astronomical clocks globally. Located on the northern wall of the Olomouc Town Hall, it underwent a complete aesthetic reconstruction in the 1950s during the Socialist Realist era. The clock face replaces traditional saint iconography with workers, farmers, and scientists, reflecting the political ideology of the time. It features a rotating mosaic depicting the changing of the seasons and a calendar dial. The mechanism includes a parade of mechanical figures that perform during its daily cycle. It is the only astronomical clock in the world to be officially redesigned according to socialist art principles.
From the center of the square looking directly at the North wall of the Town Hall.
Position yourself directly in front of the clock wall a few minutes before the hour to view the mechanical performance.
Combine this visit with a walk around Horní náměstí to see the UNESCO-listed Holy Trinity Column.
The clock is best viewed in daylight to appreciate the details of the mosaic work.
Do not mistake it for a traditional medieval astronomical clock; managing expectations regarding its 1950s style is key to appreciating it.
The mechanical performance occurs at the same time every day, though technical maintenance can occasionally suspend the movement.
