The world’s oldest astronomical clock still operating is the ‘Prague Orloj’ in Prague. The clock was first installed in 1410, making it the third-oldest astronomical clock in the world. – WTF Fun Facts
Source: https://en.wikipedia.org/wiki/Prague_astronomical_clock
WTF Fun Fact – Prague Orloj
It says the 3rd oldest in general but the oldest still operating.
how is it the world’s oldest but also the third oldest?