A lord of the manor or other patron of an area, often the Diocese, would for prestige and public convenience set up an additional church of sorts, a chapel of ease which would serve the chapelry: typically an area roughly equal to the old extent of the manor or a new industrious area. The chapels as opposed to mission churches/rooms had a date of consecration, dedication to a saint or saints and typically their own clergy and were by and large upgraded, "(re-)constituted" into parishes.
A noble of a manor or other benefactor of an area, often the Diocese, would typically establish an auxiliary church of sorts, a chapel of ease which would serve the chapelry: usually an area roughly equal to the old extent of the manor or a new industrious area. The chapels as opposed to mission churches/rooms had a date of consecration, dedication to a saint or saints and typically their own clergy and were by and large upgraded, "(re-)constituted" into parishes.