Despite Emperor Frederick II's cordial visit in Venice in 1232, the relations between the emperor and the Republic deteriorated and, in 1239, Venice joined the Lombard League and fought against Ezzelino III da Romano, a powerful ally of Frederick.
The relations between the emperor and the Republic deteriorated. This was despite Emperor Frederick II's cordial visit in Venice in 1232. Venice joined the Lombard League. This was in 1239. Venice fought against Ezzelino III da Romano. This was in 1239. Ezzelino III da Romano was a powerful ally of Frederick.