There are a lot of star forts in the world and La Lippe, or officially Nossa Senhora da Graça Fort in Portugal, is one of the most impressive ones among them. Located in Alcáçova, the fort is on top of a hill called Monte da Graça meaning the Hill of Grace. It consists of 150-meter-long star-shaped walls and separate bastions at corners. After its construction, the fort proved to be an effective deterrent against enemies. However, as years passed, its architectural merit began to come forward as well. Since 2012, the Portuguese star fort has been on the UNESCO list of World Heritage Sites.

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