▁Pres by ter ian ▁min istry . ▁He ▁served ▁as ▁a ▁past or ▁in ▁H ast ings , ▁Neb r aska ▁from ▁ 1 8 7 7 - 1 8 8 1 . ▁He ▁then ▁led ▁a ▁con greg ation ▁in ▁Kansas ▁City , ▁Missouri ▁from ▁ 1 8 8 1 ▁to ▁ 1 8 8 9 . ▁After ▁travel ing ▁in ▁the ▁Holy ▁Land , ▁Sch aff ▁was ▁called ▁to ▁Jackson ville , ▁Illinois ▁where ▁he ▁was ▁a ▁past or ▁from ▁ 1 8 9 0 ▁to ▁ 1 8 9 7 . ▁▁ ▁He ▁then ▁became ▁Professor ▁of ▁Church ▁History ▁at ▁Lane ▁The ological ▁Sem inary ▁in ▁C inc inn ati , ▁Ohio ▁until ▁ 1 9 0 3 . ▁Sch aff ▁then ▁taught ▁church ▁history ▁at ▁Western ▁The ological ▁Sem inary , ▁an ▁ante ced ent ▁of ▁Pitts burgh ▁The ological ▁Sem inary , ▁until ▁ 1 9 2 7 . ▁Pitts burgh ▁The ological ▁Sem inary ▁named ▁an ▁annual ▁lecture ▁after ▁Sch aff ▁for ▁his ▁service ▁to ▁the ▁sem inary . ▁In ▁ 1 9 2 7 , ▁Sch aff ▁began ▁a ▁term ▁as ▁L ect urer ▁in ▁American ▁Church ▁History ▁at ▁Union ▁The ological ▁Sem inary . ▁ ▁In ▁ 1 9 1 0 , ▁Sch aff ▁earned ▁a ▁Ph . D . ▁from ▁the ▁University ▁of ▁Gene va ▁in ▁Switzerland . ▁He ▁was ▁a ▁delegate ▁to ▁the ▁Pan - Pres by ter ian ▁Council ▁at ▁Aber de en , ▁Scotland ▁in ▁ 1 9 1 3 .