1- St. Peter's Basilica

St. Peter's Basilica is located in Vatican City

2- Notre Dame de Paris 

Construction on Notre Dame de Paris began in 1160 in Paris, France.

3-Florence Cathedral

It took over a hundred years to completed. It is located in  Florence, Italy

4- St. Mark's Basilica of Venice

It is one of the oldest churches in the world, with year 828 AD as the original building time

5- Las Lajas Sanctuary

Las Lajas Sanctuary is located within a canyon of the Guaitara River in Colombia.

6- Basilica of Our Lady of the Pillar Zaragoza

It was built in the early 2nd century in Spain, but the current structure was built on the same spot in 1681.

7- Our Lady of Dolours Basilica

Basilica of Our Lady of Dolours is the tallest church in Asia. 

8- Kölner Dom

 It is located in Cologne, Germany