这座城市保留了许多18世纪的历史建筑。

The city preserves many ___historic buildings from the 18th century.

该协议是国际合作的一个历史性时刻。

The agreement was a ___historic moment for international cooperation.

罗马以其古代遗迹和历史建筑而闻名。

Rome is famous for its ancient ruins and ___historic buildings.