Cividale del Friuli
In the 13th century, early literary works in Friulian were based on the language spoken in Cividale del Friuli, which was the most important town in Friuli. The endings in -o, which now is restricted to some villages in Carnia. Later, the main city of Friuli became Udine and the most common ending was -a; only from the 16th century on, -e endings were used in standard Friulian.