Preparation
The Avignon City tile is mixed in with the other land tiles.
Placing the Avigon City tile and deploying the Pope
The Avignon City tile is placed in the same way as a normal tile.
When the Avignon City tile is drawn and laid, the player who laid the tile deploys the Pope onto the city segment of the Avignon City tile.
The player can place the tile and connect it to another city that already holds a follower.
Scoring
1 point is added to every tile of the completed city if it holds the Pope.
Taking the Pope over to another city
Adding a Cathar tile or a siege tile to the city that holds the Pope will allow an opportunity to redeploy the Pope to any incomplete city on the playing area.
Then later in the game another city may get the bonus points for the Pope.
Acknowledgements
Thanks to Jonathan Warren for comments and suggestions
Approved by carcassonnecentral and carcassonne-forum