This aisle has a side-altar dedicated to the Nativity, with an anonymous 16th century altarpiece showing The Adoration of the Shepherds. There is no proper aedicule, but the painting has a very elaborate Baroque marble frame with an incut pediment and several winged putto's heads in the carving. This is now the Blessed Sacrament altar, and on the altar itself is a free-standing patinated bronze tabernacle. This interesting modern work is cylindrical with nail-head decoration, a little fish-scale cupola and a relief of The Last Supper. It is the best modern work of art in the church.

(Another photo of the altarpiece here)
(Another photo of the tabernacle here)