In 1238 Grožnjan was the property of Vicardo I Pietrapalosa. In 1286, Grožnjan fort was lent to the Aquileian patriarch during war with Venice but changed sides in 1287, and Grožnjan was given to Venice.
In 1238, Grožnjan was under the ownership of Vicardo I Pietrapalosa. In 1286, the Grožnjan fort was temporarily controlled by the Aquileian patriarch during a war with Venice but later returned to Venetian control in 1287.