I want to know the answer to the following question:
What did the abbey build on the west side?
All the background I'm provided with is that "The abbot remained Lord of the Manor of Westminster as a town of two to three thousand persons grew around it: as a consumer and employer on a grand scale the monastery helped fuel the town economy, and relations with the town remained unusually cordial, but no enfranchising charter was issued during the Middle Ages.". Is that enough to answer the question?