Coming up from the Plaza Mayor, you pass through the Puerta de Santiago . To its right is the Iglesia de Santiago, the oldest church in Trujillo, founded in the 13th century by the Knights of Santiago (look for their scallop-shell emblem).
The nave is studded with coats of arms and has a modest 14th-century altarpiece and the locally revered (and utterly compelling) sculpture of Cristo de las Aguas . Check out the re-created sacristan's room, the small belltower and the permanent nativity scene in the choir.