In which country is the world's largest stained glass window?

According to the Guinness Book of World Records, the largest stained glass window in the world resides in Justice, Illinois, United States. The window is located in Resurrection Cemetery, most popularly known as the haunting site of Resurrection Mary, a hitchhiking ghost that hangs out at the cemetery’s gate. But this mausoleum is more than just a spooky tourist attraction. It’s an example of beautiful architecture that houses some of the finest art in Illinois. The building was constructed in 1969 by an architectural firm that still has offices today in Chicago and Los Angeles.

Source: Scottish Stained Glass