The Triumphal Quadriga or Horses of St Mark's is a set of bronze statues of four horses, originally part of a monument depicting a quadriga (a four-horse carriage used for chariot racing) The horses were set into the facade of St Mark's Basilica in Venice, northern Italy after the sack of Constantinople in 1204. They remained there until looted by Napoleon in 1797 but were returned in 1815. The quadriga have been removed from the facade and place in the interior of St. Mark's for conservation purposes.
https://en.wikipedia.org/wiki/Horses_of_Saint_Mark