▁Main ▁( K no x ▁College ), ▁the ▁only ▁existing ▁site ▁of ▁the ▁ 1 8 5 8 ▁sen atorial ▁deb ates ▁between ▁Abraham ▁Lincoln ▁and ▁Stephen ▁Douglas , ▁in ▁Illinois ▁ ▁Haupt geb au de , ▁commonly ▁known ▁as ▁Old ▁Main , ▁at ▁El m h urst ▁College ▁ ▁Old ▁Main , ▁North ▁Central ▁College , ▁completed ▁in ▁ 1 8 7 0 , ▁with ▁a ▁fourth ▁floor ▁in ▁the ▁central ▁part ▁of ▁the ▁building ▁added ▁in ▁ 1 9 9 8 ▁ ▁Old ▁Main ▁( N orth ▁Park ▁University ), ▁built ▁by ▁North ▁Park ▁University ▁in ▁ 1 8 9 4 ▁in ▁North ▁Park , ▁Chicago ▁and ▁listed ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁listing ▁in ▁North ▁Side ▁Chicago ▁ ▁Indiana ▁▁ ▁Old ▁Main ▁( Fran k lin ▁College ), ▁Franklin ▁College ▁( Ind iana ), ▁Franklin , ▁Indiana ▁ ▁Iowa ▁ ▁Old ▁Main ▁( Dra ke ▁University ), ▁administrative ▁building ▁on ▁the ▁campus ▁of ▁Dra ke ▁University ▁in ▁Des ▁Mo ines ▁Old ▁Main ▁( Gr and ▁View ▁University ) ▁on ▁the ▁campus ▁of ▁Grand ▁View ▁University ▁in ▁Des ▁Mo ines , ▁listed ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁Pol k ▁County , ▁Iowa . ▁Old ▁Main ▁( I owa ▁Wes ley an ▁University ), ▁listed ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁Henry ▁County , ▁Iowa ▁Old ▁Main ▁( W art burg ▁College ), ▁listed ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁Bre mer ▁County , ▁Iowa ▁ ▁Maryland ▁Old ▁Main ▁at ▁F rost burg