Mantua is a municipality and town in the Pinar del Río Province of Cuba. It was founded in 1605 by Italian shipwrecked sailors as Mantua, Cuba…Mantua is a municipality and town in the Pinar del Río Province of Cuba. It was founded in 1605 by Italian shipwrecked sailors as Mantua, Cuba. It was founded in 1719 under the name Guane del Norte. In 1866 it was established as a municipality. The settlement of Mantua is a National Monument of Cuba.