Porticoes were covered column-lined galleries opening onto a bare space.
Porticoes could be an annex to a building or an independant construction
alongside a public square or a street. The portico of Eumenes (Stoa of Eumenes)
on this picture, linked the theatre of Dionysos to the Odeon of
Herodes Atticus (
17).
This portico was enormous when compared to the other ones.