The use of Stained glass is common in the interior design of Iranian architecture and also in Churches and Synagogues. But it may seem amazing to you to see it in Mosques. Nasir-ol-Molk Mosque is one of the few mosques in the world whose impressive interior design with “stained glass” has turned it into an admirable artwork.
This is St. Paul's cathedral. The cathedral was designed by Christopher Wren to be re-built after the Great Fire of London in 1666. Even if you are not particularly religious, you can still go and view the beauty of the cathedral.