The Protestant Cross and the Western Cross are two names for the Latin Cross.
Even though it was used as a pagan sign for millennia before the Christian Church was founded, the Latin cross (crux ordinaris) is a Christian symbol.
It’s been discovered in both China and Africa. It can be seen on Scandinavian Bronze Age stones portraying Thor’s hammer, their thunder and war deity. It was thought to be a magical sign. It brought good fortune and kept evil at bay. Some people see cross carvings on rocks as a solar symbol or an Earth symbol, with the four points denoting north, south, east, and west. Others believe it is a representation of the human shape.