The Leaning Tower of Pisa was constructed in three stages that took 177 years to complete. The foundation and first floor was started in 1173, and this first construction phase occurred during peaceful times. This photo shows the main entrance to the Leaning Tower of Pisa - can you find the three differences in this photo hunt puzzle?
Construction workers completed the first three floors of the Leaning Tower of Pisa, but then war broke out in the Tuscany area of Italy and construction stopped for 90 years.