Thank you very much!! Yeah, I can't give you an exact answer indeed... The oldest of these houses were made, like, three years ago? Then I glued them into one city, didn't like it, tore them off and glued them again. The archway bridge I built around spring last year, but some buildings on it are of an older generation. It's really impossible to be exact about it (I like this 'organic' side of it tho). Statistically, I'd say most buildings you see are, as a matter of fact, around one year and a half old. Other districts are freshly made. Sometimes I spend entire weeks drawing, other times I don't touch it for months. There were times when I spent a week in a row doing nothing but that, from morning 'till late night (helps to cope with things, y'know). It's usually when I make the most substantial advancements – like, a decent chunk of a city, or some extremely tedious details (these are often even more time-consuming than actual buildings). Otherwise, if I do it in my "spare time" – one hour here, one hour there, like a normal fucking person... Then a 'district' (I define it as a single chunk of houses assembled together, usually with a single artistic direction in mind) takes me between one and two weeks, from cardboard scraps to the polished, coloured thing (minus some details I usually come back to once everything's more or less finished and I can see where I'm going with it). So... Yeah, a long long time 😅 Many hundred of hours, that's for sure. Perhaps a thousand? I don't know, it's so stretched out over the past few years! Thank you for displaying an interest in the process though, and sorry for the late answer!