Kaziuko mugė or Saint Casimir's Fair is a large annual folk arts and crafts fair in Vilnius, Lithuania, dating to the beginning of the 17th century. The fair is traditionally held in city's markets and streets on the Sunday nearest to March 4 (Feast of St. Casimir), the anniversary of Saint Casimir's death. In Lithuanian, Kaziukas is a diminutive of Casimir. Today, Saint Casimir's fair also features music, dance, theater performances; it attracts tens of thousands of visitors and many craftsmen from across Lithuania as well as from neighbouring countries such as Latvia, Russia, and Poland. In recent years, the fair has expanded into other cities in Lithuania, Belarus, Poland.