The Romany Crucifixion Legend is a story of how a blacksmith made the nails of the cross upon which Jesus was crucified.
Versions
The condemnatory version is that as he made the nails to crucify Jesus Christ, the blacksmiths were condemned to wander the earth and never settle.
Another version does not condemn blacksmiths. It says that the blacksmith was addressed by God in a dream, where he was told to make four nails, but only hand over three, as the fourth was intended to pierce the heart of Jesus. In return God gave his descendants the right to wander the earth (rather than cursing them to it) and also the right to steal from non-Romanies, without breaking the commandment Thou shalt not steal.
References
Romany crucifixion legend Wikipedia(Text) CC BY-SA