Complex sentence: A few of the buildings are of late colonial architecture having buildings built before independence, the remainder including the National Assembly, the Caixa Económica building and its bank branches are modern architecture and is the domiant on the avenue.
Split into simpler sentences: A few of the buildings are of late colonial architecture, having been built before independence. The remainder, including the National Assembly, the Caixa Económica building and its bank branches, are modern architecture and are dominant on the avenue.