Some years ago I began work on a 1/300th scale Roman town, with modular pieces which can be interchanged to alter the layout. Emigrating and other stuff rather got in the way, so it's been a while since I added to the set-up.
Here's a trio of urban buildings, based on archaeological interpretations of Silchester, Deva and Venta Icenorum. The middle is a courtyard apartment block, the right a combined apartment/emporium, and the lower left another, slightly fancier urban dwelling.
Construction is card on foamcore and expanded polystyrene off cuts. The emporium columns are slim cocktail sticks, those of the fancier building lengths of expired ballpoint pen tube. A balcony will go on top of this.
They're all a bit basic right now. Once I've filled up some gaps they'll get a coat of paint/filler mix then window and door detailing.
Following an idea from another gamer I plan to mount these on square sections of quarter inch thick floor tile, which should be sturdy enough for the purpose. Ideas for a temple and a theatre are bubbling away at the back of my mind. Just got to work out the details...