A museum in each major city/town would be great for players to read up on lore and view ancient relics in-game, I think this would add greatly to the feeling of a real breathing world with the rich history that goes with it. I know we can all find that information on UESPWiki etc.. but imo to have it in-game would add a whole other level of immersion.
You could have an NPC in each museum who would give you a tour for a small price and some might even have relic finding job's to offer the player, like I said book's in the museum on the towns lore and the odd relic would be cool too.
Anybody agree/disagree?