 The painted frieze above the astronomical clock shows five deities from classical antiquity , each representing both a day of the week and a planet in their order according to Ptolemaic cosmology . From left to right , they are : Saturn with sickle and club for Saturday , Jupiter with thunderbolts for Thursday , Mars with sword and shield for Tuesday , Venus with Cupid for Friday and Mercury with staff and bag for Wednesday . The painting of the entire clock area was refurbished in 1983 . Only the matte areas on the clock face are from the earlier coat of paint . 
