Tower of Pedro-Sem
Portugal
The 186th tallest tower in the world
The Tower of Pedro-Sem (Torre do Palácio dos Terenas/Torre de Pedro-Sem/Torre da Marca) is a medieval fortification situated in the civil parish of Lordelo do Ouro e Massarelos, that protected the northern Portuguese city of Porto.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).