Legend for the City Diagrams

Housing

— tent — house — medium house
— large house —palace

1x1 Buildings

— barber — doctor/clinic — engineer — prefect
— fountain — well — statue — garden
— road — plaza

2x2 Buildings

— bath — market — school 
— library — theatre — forum
— mission — statue — garden
— wharf
— pottery — wine — furniture
— weapons — oil — "generic"
— clay — iron — wood
— marble
— Venus — Mars — Neptune
— Ceres — Mercury  — oracle
— tower — gatehouse

3x3 Buildings

— granary — warehouse — dock
— actor
colony 		— gladiator
school		 — amphitheater
— lion pit — chariot
maker
— hospital — academy — statue
— barracks — military
academy		 — triumphal
arch
— Ceres — Mercury — Neptune
— Mars — Venus
— wheat — vines — pigs
— vegetables — fruit — olives

Other

— fort — small
palace
— colloseum
— hippodrome