Radvila Astikas

Radvila Astikas or Astikaitis (baptized Nicholas; ; died in 1477) was a magnate, a member of the Astikai and founder of the Radziwiłł family. He was a member of the Lithuanian Council of Lords and one of the most influential people in the Grand Duchy of Lithuania during his lifetime.

Astikas was one of the sons of Kristinas Astikas. He was first mentioned in written sources in the 1411 Treaty of Melno. He was Grand Duke's marshal in 1420–29 and 1440–52. Radvila Astikas was Voivode of Trakai (1466–77) and Castellan of Vilnius (1475–77), as well as Grand Marshal of Lithuania (1433–34, 1463–74). He was sent to several diplomatic missions: to Teutonic Knights in 1466, 1447, and 1448, to Golden Horde in 1452. He also participated in negotiating the 1473 Treaty of Kurcums which defined the Lithuanian–Livonian border.