The Nossa Senhora da Graça Fort, Conde de Lippe Fort and known historically as La Lippe, is an 18th century fort in the village of Alcáçova, Portugal.
Its position atop Monte da Graça made it an influential stronghold during the Seven Years’ War, War of the Oranges, and the Peninsular War. The fort is part of the Garrison Border Town of Elvas and its Fortifications and was classified a UNESCO World Heritage Site in 2012.
Star Forts, also recognized as bastion forts or trace italienne, is a fortification in a style that developed during the early modern period of gunpowder when the cannon came to rule the battlefield. It was first seen in the mid-fifteenth century in Italy.