The Kórnik Arboretum in Kórnik, in western Poland, is the largest and oldest arboretum in Poland and fourth-largest arboretum in Europe, with over 3300 taxa of trees and shrubs. It was established in the early 19th century around the historical Kórnik Castle by its owner, Count Tytus Działyński, later enriched with new species and varieties by his heirs, his son Jan Kanty Działyński and grandson Władysław Zamoyski. The Institute of Dendrology of the Polish Academy of Sciences is located within the arboretum.