Broletto is an ancient Italian

Italian language

Italian is a Romance language spoken mainly in Europe: Italy, Switzerland, San Marino, Vatican City, by minorities in Malta, Monaco, Croatia, Slovenia, France, Libya, Eritrea, and Somalia, and by immigrant communities in the Americas and Australia...

 word, from medieval Latin

Medieval Latin

Medieval Latin was the form of Latin used in the Middle Ages, primarily as a medium of scholarly exchange and as the liturgical language of the medieval Roman Catholic Church, but also as a language of science, literature, law, and administration. Despite the clerical origin of many of its authors,...

 "broilum, brogilum", which probably derives from a Celtic

Celtic languages

The Celtic languages are descended from Proto-Celtic, or "Common Celtic"; a branch of the greater Indo-European language family...

 word. Its first meaning is "little orchard or garden"; hence the meaning "field surrounded by a wall". Another meaning refers to a "place where justice is administered".
This meaning explains why several places or buildings in northern Italy are called "Broletto".

Ancient Brolettoes (it.:"Broletti") are major buildings in Milan

Milan

Milan is the second-largest city in Italy and the capital city of the region of Lombardy and of the province of Milan. The city proper has a population of about 1.3 million, while its urban area, roughly coinciding with its administrative province and the bordering Province of Monza and Brianza ,...

, Brescia

Brescia

Brescia is a city and comune in the region of Lombardy in northern Italy. It is situated at the foot of the Alps, between the Mella and the Naviglio, with a population of around 197,000. It is the second largest city in Lombardy, after the capital, Milan...

, Pavia

Pavia

Pavia , the ancient Ticinum, is a town and comune of south-western Lombardy, northern Italy, 35 km south of Milan on the lower Ticino river near its confluence with the Po. It is the capital of the province of Pavia. It has a population of c. 71,000...

, Piacenza

Piacenza

Piacenza is a city and comune in the Emilia-Romagna region of northern Italy. It is the capital of the province of Piacenza...

, Como

Como

Como is a city and comune in Lombardy, Italy.It is the administrative capital of the Province of Como....

, Monza

Monza

Monza is a city and comune on the river Lambro, a tributary of the Po, in the Lombardy region of Italy some 15 km north-northeast of Milan. It is the capital of the Province of Monza and Brianza. It is best known for its Grand Prix motor racing circuit, the Autodromo Nazionale Monza.On June...

, Reggio Emilia

Reggio Emilia

Reggio Emilia is an affluent city in northern Italy, in the Emilia-Romagna region. It has about 170,000 inhabitants and is the main comune of the Province of Reggio Emilia....

, Novara

Novara

Novara is the capital city of the province of Novara in the Piedmont region in northwest Italy, to the west of Milan. With c. 105,000 inhabitants, it is the second most populous city in Piedmont after Turin. It is an important crossroads for commercial traffic along the routes from Milan to Turin...

and others.