Almost every religion teaches that there is something after death, a hereafter: heaven, hell (eternal torment), purgatory (a place or state of suffering inhabited by the souls of sinners who are expiating their sins before going to heaven), or Limbo. Other religions believe in rebirth as a different life-form. The atheist and Agnostic say that we cannot know.
The so-called ‘staurogram’ is a device that likewise seems to have been deployed in early Christian manuscripts as an expression of Christian faith. Specifically, the earliest Christian uses of the device are as part of the way that the words σταυρος (‘cross’) and σταυροω (‘crucify’) are written in some early manuscripts containing NT texts. The ‘staurogram’ comprises our earliest visual references to the crucified Jesus.