Final answer:
The relics brought from Egypt to Venice were those of St. Mark, which are now housed in the Saint Mark's Basilica, adorned with golden mosaics.
Step-by-step explanation:
The relics obtained from Egypt for Venice were those of St. Mark. Saint Mark's Basilica in Venice, Italy, begun in 1063, is the site where the body of the Evangelist St. Mark is housed. His remains were smuggled out of Alexandria and brought to Venice in 829. The basilica's interior is decorated with gold mosaics, influenced by Byzantine art, reminiscent of Constantinople. It has become a significant landmark in Venice, attracting countless visitors and pilgrims who come to venerate St. Mark's relics.