...Sometimes the criminal had to get to the church itself to be protected, and might have to ring a certain bell there, or hold a certain ring or door-knocker, or sit on a certain chair ("frith-stool"), and some of these items survive at various churches. In other places, there was an area around the church or abbey, sometimes extending as much as a mile and a half, and there would be stone "sanctuary crosses" marking the boundary of the area; some of those still exist as well. Thus it could become a race between the felon and medieval law officers to the nearest sanctuary boundary, and could make the serving of justice a difficult proposition.

Church sanctuaries were regulated by common law. An asylum seeker was to confess his sins, surrender his weapons, and be placed under the supervision of the head of the church or abbey where he had fled. He then had forty days to make one of two choices: surrender to secular authorities and stand trial for the crimes against him, or confess his guilt and be sent into exile (abjure the realm), by the shortest route and never return without the king's permission. Anyone who did come back could be executed by the law and/or excommunicated by the Church....