Sentence:  A passage at the other end [of the dormitory from the passage to the south transept of St Gall's church leads to the “<WSD>necessarium</WSD>” (I), a portion of the monastic buildings always planned with extreme care. 
Meaning of the word marked with <WSD> tags:  (nodot=1): a monastery's latrine, outhouse, or lavatory, typically located behind the dormitory.