The Pala d'Oro is a highly ornate altarpiece in St. Mark's Basilica in Venice, Italy. The golden altarpiece is studded with 1,300 pearls, 300 emeralds, 300 sapphires, 400 garnets, 100 amethysts, rubies, and topazes, making it the most precious Byzantine altarpiece. The altar depicts Biblical scenes like the enthroned Virgin Mary with the baby Jesus and Christ Pantocrator. Visitors to St. Mark's Basilica can view the Pala d'Oro and appreciate its exceptional beauty and historical significance.