Friars transformed the relationship of the church to laymen by taking religion outside to public and domestic spaces. Mendicant commitment to apostolic poverty bound friars to donors in an exchange of donations in return for intercessory prayers and burial: association with friars was believed to reduce the suffering of purgatory. Mendicant convents became urban cemeteries, warehouses filled with family tombs, flags, shields, and private altars.

As mendicants became progressively institutionalized and sought legitimacy, friars adopted the architectural structures of monasticism: chapter...