That particular cross is known as the cross of St. Peter, who chose to be crucified upside down in deference to Jesus' crucifixion.

It can also be found in the ancient Roman Mamertine Prison, where Peter was held after he was arrested.

This site will give you some information and photos. Although sadly, nothing will stop your hatred and bigotry. There is no website large enough to cure your hypocrisy.

[link to www.rome-tour.co.uk]