Leonardo da Vinci's study of embryos, c. 1510-1513, pen over red chalk, 12 x 8" (30.5 × 20 cm), Royal Library, Windsor Castle.

In art a study is a drawing, sketch or painting done in preparation of a finished piece, or as visual notes. Leonardo da Vinci (April 15, 1452 – May 2, 1519) was an Italian Renaissance architect, musician, anatomist, inventor, engineer, sculptor, geometer, and painter. ... Events Conquest of Pskov by Grand Prince Vasili III of Muscovy. ... Events January 20 - Christian II becomes King of Denmark and Norway. ... Royal Library can mean: Danish Royal Library - the national library of Denmark Swedish Royal Library - the national library of Sweden The former name of the Bibliothèque nationale de France - the national library of France This is a disambiguation page — a navigational aid which lists other pages that might otherwise share... An early 18th century view of Windsor Castle by Kip and Knyff. ...