▁K empt en . ▁ ▁Point s ▁of ▁interest ▁ ▁The ▁Roman ▁Ir gen hausen ▁Cas tr um is ▁located ▁in ▁Ir gen hausen ▁on ▁the ▁shore ▁of ▁Pf ä ff iker see . ▁ ▁Notable ▁people ▁▁ ▁Jakob ▁He us ser ▁( 1 8 6 2 – 1 9 4 1 ), ▁Swiss ▁industrial ist ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Official ▁website ▁of ▁the ▁municipality ▁of ▁Pf ä ff ikon ▁( Z H ) ▁▁▁▁ ▁Category : V ill ages ▁in ▁the ▁canton ▁of ▁Zürich ▁Category : P f ä ff ikon , ▁Zürich ▁Category : P f ä ff iker see <0x0A> </s> ▁David ▁Sch ley ▁Sch aff ▁( 1 7 ▁October ▁ 1 8 5 2 , ▁Mer cers burg , ▁Pennsylvania ▁– ▁ 2 ▁March ▁ 1 9 4 1 , ▁Winter ▁Park , ▁Florida ) ▁was ▁a ▁United ▁States ▁Pres by ter ian ▁cl erg yman , ▁educ ator ▁and ▁pione er ▁of ▁American ▁football . ▁ ▁Biography ▁He ▁was ▁the ▁son ▁of ▁the olog ian ▁and ▁historian ▁Philip ▁Sch aff . ▁He ▁prepared ▁for ▁college ▁at ▁Phill ips ▁Academy , ▁And over , ▁the ▁g ymnasium ▁at ▁K orn th al , ▁Germany , ▁and ▁at ▁the ▁Rugby ▁School ▁in ▁England . ▁Sch aff ▁graduated ▁from ▁Y ale ▁in ▁ 1 8 7 3 ▁( A . B .) ▁and ▁from ▁Union ▁The ological ▁Sem inary ▁in ▁ 1 8 7 6 . ▁In ▁ 1 8 7 7 , ▁he ▁was ▁ord ained ▁in ▁the