Gruczno was the site of a medieval Polish stronghold.[2] The name of the village comes from the Polish word gród, which means "stronghold".[2] During the fragmentation period, it was located within the Duchy of Pomerania (eastern) within the fragmented Polish realm. The oldest known mention of a parish priest in Gruczno comes from 1238.[2] In 1290, Duke Mestwin II sold the village to the Archbishop of Gniezno.[2] Gruczno was visited by several Archbishops of Gniezno, and it was administered by the Archdiocese until the late-18th-century Partitions of Poland,[2] when it was annexed by Prussia. Following World War I, Poland regained independence and control of the village.
^ abcdeSłownik geograficzny Królestwa Polskiego i innych krajów słowiańskich, Tom II (in Polish). Warsaw. 1881. p. 860.{{cite book}}: CS1 maint: location missing publisher (link)
^The Pomeranian Crime 1939. Warsaw: IPN. 2018. p. 41.
^Wardzyńska, Maria (2017). Wysiedlenia ludności polskiej z okupowanych ziem polskich włączonych do III Rzeszy w latach 1939-1945 (in Polish). Warsaw: IPN. pp. 81, 94. ISBN978-83-8098-174-4.