They ruled the 79 towns of medieval Provence and their impregnable fortress became a center of courtly love prized by traveling troubadours.
They ruled 87 towns even though their fortress was weak.
mnli hypothesis: They ruled 87 towns even though their fortress was weak. premise: They ruled the 79 towns of medieval Provence and their impregnable fortress became a center of courtly love prized by traveling troubadours.