What you'll hear inside St. Mark's Basilica:

• 1
  St Mark's Museum

  Houses the original Horses of St.

• 2
  Pala d'Oro

  Byzantine goldwork altarpiece with enamels and gemstones, one of Europe's most valuable treasures.

• 3
  Treasury of St Mark's

  Rooms between the basilica and Doge's Palace with Byzantine goldwork from the 1204 sack and 110 reliquaries.

• 4
  Narthex and Creation Dome

  Atrium with Old Testament mosaics such as the Creation Dome; home to the basilica's oldest mosaics.

• 5
  Dome of the Ascension

  Late-12th-c. central dome with Christ ascending amid the Virgin and the Twelve Apostles.

• 6
  Dome of Pentecost

  12th-c. dome over the nave: the Holy Spirit's rays descend on the seated Apostles.

• 7
  Dome of the Prophets and Apse Pantocrator

  Christ Pantocrator mosaic in the apse semi-dome, above Venice's protector saints.

• 8
  Marble Floor

  11th-12th-c. opus sectile floor with geometric patterns and symbolic animals in coloured marble.

• 9
  Rood Screen (Iconostasis)

  Gothic rood screen (1394) with a crucifix and statues of the Virgin, St Mark and the Apostles.

• 10
  High Altar and Tomb of St Mark

  High altar holding St Mark's relics since 1835, under a ciborium on four carved columns.

• 11
  Altar of the Madonna Nicopeia

  North-transept altar with the Byzantine Nicopeia icon, once Venice's palladium.

• 12
  Crypt

  Crypt beneath the chancel that held St Mark's body until 1835; open only on special tours.

• 13
  Zen Chapel

  Former south entrance hall turned (1503-15) into Cardinal Giovanni Battista Zen's funerary chapel.

• 14
  Baptistery

  14th-c. baptistery with St John the Baptist mosaics, Sansovino's font and two doges' tombs.

• 15
  Mascoli Chapel

  Chapel dedicated in 1430 under Doge Francesco Foscari, later used by the Mascoli confraternity.

• 16
  Chapel of St Isidore

  Chapel built 1348-55 by Doge Andrea Dandolo for the relics of St Isidore of Chios.

• 17
  Main Façade

  Façade with five portals, mosaics of the translation of St Mark's body and a Gothic crowning.

• 18
  The Tetrarchs

  4th-c. porphyry group of the Tetrarchs set into the Treasury corner on the south façade.