 The church 's north and south walls are supported by a series of buttresses . Seven windows run along each wall . A line of brick <unk> runs along the walls below the eaves . Near the east end of the church , a short transept extends a short distance outward . At the church 's east end , beyond the transept , is a semicircular apse with a conical roof , topped with a six @-@ <unk> conical <unk> . 
