St. Mark's Library is located in the Piazza San Marco in Venice, Italy, for the 16th century building, is a masterpiece left by the famous architect San Sovino in Venice, so this library is named after him, when built, Sansovino chose a narrow strip to build, and adopted a double-storey arcade structure like the general mansion, only slightly lower in height. This long arcade with classical pillars is simple and long, and is now a public place for shade and leisure.