Home of the Worshipful Company of Mercers.
The overlays that highlight 17th century London features are approximate and derived from Wenceslaus Hollar’s maps:
Open location in Google Maps: 51.514028, -0.091588
Mercers' Hall is north of Cheapside @ 1:00, east of Ironmonger Lane
Chart showing the number of references in each month of the diary’s entries.