Tower of D. Pedro Pitões
Portugal
The 186th tallest tower in the world
The Tower of D. Pedro Pitões (Torre de D. Pedro Pitões/Torre da Cidade) is a former-medieval fortification situated in the civil parish of Cedofeita, Santo Ildefonso, Sé, Miragaia, São Nicolau e Vitória, that protected the northern Portuguese city of Porto.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).