The measures taken for the protection of the monuments and works of art of Europe during the recent war, besides saving an incalculable number from damage or destruction, have also made available for detailed study many that are normally difficult or impossible of access. One such has been the bronze lion of St. Mark, familiar indeed to every visitor to Venice but only at a respectable distance, from the loggia of the Doge's Palace or from the foot of its lofty column by the waterfront of the Piazzetta di San Marco. In 1941, together with its companion figure of St. Theodore, the four bronze horses from the facade of St. Mark's, the great equestrian bronze of Colleoni, and numerous lesser works, it was lowered to safety and stored throughout the war in the vaults of the Doge's Palace. Shortly after the liberation of Venice in 1945 it re-emerged to form part of a unique temporary exhibition in the courtyard of the Palace, after which it was replaced once more upon its column. The writer is indebted to Commendatore Forlati, Superintendent of Monuments for the Veneto, for permitting publication and for much courteous help in eliciting facts and photographs ; and to many colleagues in Rome for criticism and comment—helpful not least by its variety. While venturing some comment on what is evidently a provocative and controversial animal, it must be stressed that the primary purpose of this article is the presentation of a detailed description of the statue, accompanied by the known historical facts and by adequate illustration. These will at least enable others, better qualified, to pass long-overdue judgment on one of the select company of ancient works of art that have never been below ground since the day they were made.