The Historical Housing Prices Project gives rents and home prices from 1890 – 2006 for US cities. It’s based on newspaper listings and was led by Ronan C. Lyons, Allison Shertzer, and Rowena Gray. I’ve added Ronan’s blog, Time & Space, to the links below.
City Density displays and compares the population density of scores of world cities across their linear transects. I’ve added Aussie creator Jonathan Nelson’s substack to the links as well.
Human Terrain shows the same data, I believe, but in a 3D map format.