could pick up the various animal habitats and natural/geological environments
Religion and Belief
A fair number of these still left - issue about whether to take out Cathedrals from Objects
There are a number of manufacturing, mining etc. I can't think of anything better at the moment than "Human Activity" which we used for Category as well. could also cover Opera, Scripts, Salt, Spice route, Silk rd, Sport, Exhibitions, Erotic art etc.
Forts goes quite well in "objects" (Call it "Objects/Buildings"?)
Highest , 7 Wonders , Isolated, Uninhabited, Disputed, Replica can go in Trivia
Crusades in historical events. I might have merged historical events and ages?
There shouldn't be too many left after that - perhaps if something is left it must be "trivia"! How many "groupings" do we want? We must be past/around 250 connections now. Target a max of c 50 per any 1 grouping -enough to be taken in "at a quick glance"/ on one 1 full display page? Equally don't want too many "small" ones