▁National ▁Register ▁of ▁Historic ▁Places . ▁ ▁Old ▁Main ▁( S li pp ery ▁Rock ▁University ), ▁campus ▁of ▁SR U ▁of ▁PA . ▁ ▁Old ▁Main ▁( M ans field ▁University ), ▁a ▁building ▁on ▁Mans field ▁U . ▁of ▁PA ▁campus . ▁ ▁Old ▁Main ▁( B lo oms burg ▁University ), ▁a ▁building ▁on ▁the ▁campus ▁of ▁Blo oms burg ▁U . ▁of ▁PA . ▁ ▁Old ▁Main ▁( Sh ipp ens burg ▁University ), ▁the ▁first ▁building ▁on ▁the ▁campus ▁of ▁Sh ipp ens burg ▁University ▁of ▁Pennsylvania ▁ ▁Old ▁Main ▁( Cal iforn ia ▁University ▁of ▁Pennsylvania ), ▁a ▁building ▁on ▁the ▁campus ▁of ▁California ▁University ▁of ▁Pennsylvania ▁ ▁Old ▁Main ▁( P en nsylvan ia ▁State ▁University ), ▁a ▁building ▁on ▁the ▁campus ▁of ▁Pennsylvania ▁State ▁University ▁ ▁Old ▁Main ▁( W ashington ▁& ▁Jefferson ▁College ), ▁a ▁building ▁on ▁the ▁campus ▁of ▁Washington ▁& ▁Jefferson ▁College ▁ ▁Old ▁Main ▁( G ene va ▁College ), ▁the ▁first ▁building ▁on ▁the ▁campus ▁of ▁Gene va ▁College ▁in ▁Be aver ▁F alls , ▁Pennsylvania ▁ ▁Old ▁Main ▁( W id ener ▁University ), ▁a ▁building ▁on ▁the ▁campus ▁of ▁W id ener ▁University , ▁Ch ester , ▁PA ▁Old ▁Main ▁( Fran k lin ▁& ▁Marshall ▁College ), ▁Franklin ▁& ▁Marshall ▁College ▁Old ▁Main ▁( West min ster ▁College ), ▁a ▁building ▁on ▁the ▁campus ▁of ▁West min ster ▁College ▁ ▁South ▁Dak ota ▁▁ ▁Old ▁Main ▁( Univers ity ▁of ▁South ▁Dak ota ), ▁a ▁building ▁on