Rua da Assunção 45, 4050-367 Porto, PT
The Clérigos Church and Tower is one of the most iconic landmarks in the city of Porto. The tower is part of the historical center of the city, which is a designated UNESCO World Heritage site. The tower was build in the 18th century.
Question:
how many years did it take to build the tower?
7, 18, 22, or 26