Piazza San Marco - Pavement

Pavement

The Piazza was paved in the late 12th century with bricks laid in a herringbone pattern. Bands of light-colored stone ran parallel to the long axis of the main piazza. These lines were probably used in setting up market stalls and in organizing frequent ceremonial processions. This original pavement design can be seen in paintings of the late Middle Ages and through the Renaissance, such as Gentile Bellini's Procession in Piazza San Marco of 1496.

In 1723 the bricks were replaced with a more complex geometrical pavement design laid out by Venetian architect Andrea Tirali. Little is known about Tirali's reasoning for the particulars of the design. Some have speculated that the pattern was used to regulate market stalls, or to recall their former presence in the square. Others believe the pattern was drawn from oriental rugs, a popular luxury item in this trading center.

A field of dark-colored igneous trachyte with geometrical designs executed in white Istrian stone, similar to travertine composed the design. Squares of diagonally-laid blocks alternated with rectangular and oval designs along broad parallel bands. The squares were pitched to the center, like a bowl, where a drain conducted surface water into a below-grade drainage system. The pattern connected the central portal of the Basilica with the center of the western opening into the piazza. This line more closely parallels the façade of the Procuratie Vecchie, leaving a nearly triangular space adjacent to the Procuratie Nuove with its wider end closed off by the Campanile. The pattern continued past the campanile, stopping at a line connecting the three large flagpoles and leaving the space immediately in front of the Basilica undecorated. A smaller version of the same pattern in the Piazzetta paralleled Sansovino's Library, leaving a narrow trapezoid adjacent to the Doge's palace with the wide end closed off by the southwest corner of the Basilica. This smaller pattern had the internal squares inclined to form non-orthogonal quadrilaterals.

The overall alignment of the pavement pattern serves to visually lengthen the long axis and reinforce the position of the Basilica at its head. This arrangement mirrors the interior relationship of nave to altar within the cathedral.

As part of the design, the level of the piazza was raised by approximately one meter to mitigate flooding and allow more room for the internal drains to carry water to the Grand Canal.

In 1890, the pavement was renewed "due to wear and tear". The new work closely follows Tirali's design, but eliminated the oval shapes and cut off the west edge of the pattern to accommodate the Napoleonic wing at that end of the Piazza.