I've imagined Nyreen as a city of travellers and merchants. To help people get around who don't speak the local language, planners put coloured flags along major routes to help them (and players, of course) find their way around.
Some colour and seasonal variations.
Initial sketches. I knew early on I wanted to incorporate the flags and go for a mostly stone construction that suits Nyreen's desert mountain location.
Signpost concepts for the fictional city of Nyreen.