The astronomical clock was first installed in 1410.

Feodosy Mikhailovich Fedchenko has written:

'Astronomical clock with an electromagnetically driven pendulum'

'Astronomical clock AchF-1 with isochronous pendulum'

A few astronomical clocks exist in different parts of the world. If you are referring to the famous astronomical clock located in Prague, Czech Republic, it is found in Old Town City Hall and is still functioning.

The first clock was an astronomical clock. It was built between 1352 and 1354. However, it stopped working around the beginning of the 16th century.

In Prague there is a famous Prague Astronomical Clock or Prague Orloj, to which I think you are referring.

see the link below.