Lion of Saint Mark

The Lion of Saint Mark, representing the evangelist St Mark, pictured in the form of a winged lion holding a Bible, is the symbol of the city of Venice and formerly of the Republic of Venice, as well as of the Greek Orthodox Patriarchate of Alexandria, See of Saint Mark. It appears also in both merchant and military naval flags of the Italian Republic. The Lion of Saint Mark is also the symbol of the award of the Venice Film Festival, the "Golden Lion", and of the insurance company Assicurazioni Generali.

Other elements often included in depictions of the lion include a halo over his head, a book, and a sword in its paws.

Venetian tradition states that when St. Mark was traveling through Europe, he arrived at a lagoon in Venice, where an angel appeared to him and said "Pax tibi Marce, evangelista meus. Hic requiescet corpus tuum." (May Peace be with you, Mark, my evangelist. Here your body will rest.) This (possibly apocryphal) tradition was used as justification by Rustico da Torcello and Bon da Malamocco in 828 for stealing the remains of St. Mark from his grave in Alexandria, and moving them to Venice, where they were eventually interred in the Basilica of St. Mark.

St Mark, represented as a lion, is a typical Christian iconography derived from the prophetic visions contained in the verse of the Apocalypse of St John 4:7. The lion is one of the four living creatures described in the book as a place around the throne of the Almighty and they are chosen as symbols of the four evangelists. These "beings" were previously described by the prophet Ezekiel.

"Behold, I send my messenger ahead of you, he will prepare your way."

...
Wikipedia