In the 1st century B.C., Julius Caesar founded Forum Iulii. In 568 A.D. it became the capital of the first Lombard duchy in Italy and was later the residence of the Patriarchs of Aquileia. After 350 years under the Republic of Venice, it became part of the Kingdom of Italy. During World War I, the city was initially the Italian rear and in the Twelfth Isonzo Battle it became the scene of the first attempt to stop the advancing Austro-Hungarian and German Army at Purgessimo.
Cividale del Friuli/Čedad has been on the UNESCO World Heritage list since 2011 because of the importance of Lombard architectural and decorative achievements.