If you aren’t following the Public Record Office of Northern Ireland on Flickr, you should be.
Aside from a seemingly never ending flow of cool historical photos, they also post interesting things like architectural plans from Crumlin Road Prison/Belfast Gaol, melds of old photos with current ones, and even the occasional weird clown. (Pretty sure we’re related.)
But, some real gems that genealogists might find even more exciting are a collection of full color 17th century barony maps.
I’ve selected one randomly beautiful one to display here (“Tyrconnelle, etc.”), but there are quite a few to page through.