Geograph - photograph every grid square

Grade I listed buildings and structures are of exceptional, even international importance. There are over 6,000 in the country. Only 2.5% of listed buildings are Grade I listed.
In Scotland the classification is Category A
Index: Link

All Souls College, Oxford (official name: The Warden and the College of the Souls of All Faithful People Deceased in the University of Oxford) is a constituent college of the University of Oxford . Founded in 1438 by Henry VI.

Unique to All Souls, all of its members automatically become Fellows (i.e., full members of the College's governing body). It has no undergraduate members, but each year recent graduates of Oxford and other universities are eligible to apply for Examination Fellowships through a competitive examination and interview process (once described as "the hardest exam in the world")
Wikipedia: Link
Website. Link