St Peter’s College, Oxford. The main entrance (Linton House) is a Georgian rectory from 1797, now housing the porter’s lodge and college library. The college chapel, the Church of St Peter-le-Bailey, dates to 1874 and incorporates stones from older churches on the site.
in fact  St Peter’s is built on sites of ancient university halls, including New Inn Hall and Trilleck’s Inn, whose traces can be found in cellars and wall foundations beneath the college. 
 
Interesting facts...
Although often perceived as modern, St Peter’s is built on sites of ancient university halls, including New Inn Hall and Trilleck’s Inn, whose traces can be found in cellars and wall foundations beneath the college. Parts of the stonework in the college quadrangle and certain interiors originate from the medieval structures long vanished from Oxford’s landscape.