The Clock Tower in Venice (Torre dell'Orologio) is a Renaissance landmark on Piazza San Marco, completed in 1499, featuring an astronomical clock face, mechanical figures, and two iconic bronze bell-strikers known as the Moors. The tower straddles the archway that opens into the Merceria, Venice's principal shopping street since medieval times, designed as both a public timepiece and a triumphal gateway connecting the political heart of the city to its commercial artery. The astronomical clock face, crafted by Zuan Carlo Rainieri of Reggio Emilia starting in 1493, displays the hours, zodiac signs, and phases of the moon in blue and gold enamel. Above the clock, a gilded Madonna and Child receive a procession of mechanical wooden Magi figures during Epiphany and Ascension. At the very top, the two colossal bronze Mori strike a large bell on the hour, their greenish patina a familiar sight against the Venetian sky. St. Mark's Clock Tower is accessible inside only through small-group guided tours that take you past the clock's remarkable mechanism of pulleys, weights, and gears, through the rooms housing the Magi figures, and up to the rooftop terrace where the Mori stand. The view from the top provides a unique close perspective over Piazza San Marco and across the lagoon. The building has been attributed to architect Mauro Codussi, whose classical design vocabulary set it apart from the existing Gothic and Byzantine architecture of the square. Side wings were added in the early 1500s and raised by Giorgio Massari in the 18th century.