Quiz: Test your Welsh regions knowledge with this BBC Wales Sport quiz
Judgement Day is soon upon us and once again, the four Welsh regions - Ospreys, Scarlets, Cardiff Blues and Newport Gwent Dragons - will play two games on the hallowed Principality Stadium turf.
But, with just a few days to go until the Pro12 spectacle gets under way, just how good is your knowledge of Welsh rugby, anyway?
BBC Wales Sport presents the ultimate regional quiz ahead of the fifth Judgement Day in the Welsh capital.
Subscribe to the BBC Sport newsletter to get our pick of news, features and video sent to your inbox.