Population of the Royal Court of Casimir IV Jagiellon in the Light of the Censuses of Courtiers from the Years 1470 and 1478

The hitherto unpublished excerpts from the account record of sub-treasuries from the years 1470 and 1478, which were dispensed by Tomasz Trąmbczyński, and which are kept in the Central Archives of Historical Records in Warsaw (Crown Treasury Archive Complex, Branch 1 Royal Accounts, ref. no. 338; Division 85 Crown Army Signature Registers, ref. no. 1) feature comprehensive lists of equerries with the court of Casimir IV Jagiellon, therefore constituting invaluable sources of knowledge about the organization, composition and population of the Polish royal court at that time. Among some of the insights they offer is the clear distinction between courtiers and royal valets among the members of the