https://castles.bussetech.com/ Canonical Castles — how many castles are there? A source-cited dataset that answers per definition, not in general: every structure records which definitions of castle it satisfies, and every definition carries its own count and closure rule. en https://castles.bussetech.com/2026/07/21/project-founded.html https://castles.bussetech.com/2026/07/21/project-founded.html Tue, 21 Jul 2026 00:00:00 +0000 A Hacker News thread took aparta map of “the world’s 2,400 castles” today. The coverage complaints were loud —Saxony showing nine structures against a literature that counts hundreds, Franceshowing about a hundred against a folkloric forty-five thousand. But the sharperproblem was quieter: the map published a single integer for a contested term.