Piazza San Marco
Piazza San Marco Site Features
Architecture
The square's paved floor follows a geometric pattern of radiating trapezoidal bands, designed in the early 18th century by Andrea Tirali to visually correct the piazza's irregular, slightly trapezoidal shape and make it read as more regular than it actually is -- the same optical logic behind the square's tapering sides.
The two arcaded buildings framing the square were built more than a century apart and in different styles: the Procuratie Vecchie, on the north side, is early 16th-century and still shows late Gothic proportions in its arcade, while the Procuratie Nuove opposite it, designed by Vincenzo Scamozzi and finished under Baldassare Longhena, is a fully classical composition modeled partly on Sansovino's nearby library -- a rare case of two directly facing facades built a century apart in deliberately different architectural languages.
Site Features
"The finest drawing room in Europe"
Napoleon is popularly credited with calling Piazza San Marco "the finest drawing room in Europe," a line (real attribution unproven) that has stuck as shorthand for the square's grandeur -- an open, arcaded space ringed by some of Venice's most significant buildings rather than ordinary streets and shopfronts.
The buildings that frame the square
St. Mark's Basilica anchors one end of the piazza, its Byzantine domes and gilded mosaics facing directly onto the square, with the Campanile bell tower rising alongside it. Long arcaded buildings -- the Procuratie Vecchie and Procuratie Nuove -- line the north and south sides, historically housing Venice's civic administrators and now home to shops, cafes, and museums.

Pigeons, flooding, and cafe life
The piazza is Venice's lowest point, and it's the first place in the city to flood during acqua alta, the seasonal high tides that put parts of the square underwater; raised walkways are a common sight here during those periods. Thousands of pigeons share the square with visitors year-round, drawn by vendors selling seed to feed them -- fending them off (or feeding them) is practically a rite of passage for anyone crossing the piazza.
Historic cafes with outdoor seating and live orchestras have lined the square's arcades for centuries, giving the piazza its enduring reputation as Venice's social gathering place. Caffè Florian, which has operated continuously since 1720 and is considered the oldest coffee house in Italy still in business, once counted Lord Byron and Henry James among its regulars; its longtime rival Caffè Quadri, across the square, was reportedly favored by occupying Austrian troops for Turkish coffee in the early 19th century. Some cafes still charge a cover fee for the string-quartet performances that accompany an evening coffee at their outdoor tables.
Landscape
Piazza San Marco is Venice's largest square and, unusually for the city, a genuinely open, trapezoidal space rather than a tight cluster of buildings and alleys -- it widens slightly toward the basilica end, an effect that makes the square look even larger when viewed from that side. As the lowest-lying point in Venice, it is also the first area to flood during acqua alta, sitting only slightly above the average lagoon water level.