Venice, seen from the Campanile di San Marco, the bell tower of St Marks Basilica. In the foreground the Procuratie Vecchie (left) and the Torre dell Orologio (right) on St Marks Square (Piazza San Marco). This tower is of huge importance, both practical, historical and symbolic in the story of Venice. The clock (alternatively known as St Marks Clocktower or the Moors Clocktower) displays the time of day, the dominant sign of Zodiac and the current phase of the moon. The Procuratie Vecchie on the north side of the Square, built as a two-storey structure in the twelfth century, to house the offices and apartments of the procurators of San Marco. They were rebuilt after a fire in the sixteenth century to a three-storey design.