ß feld ▁and ▁to ▁Al ten m ün ster . ▁ ▁The ▁Royal ▁Wür ttemberg ▁State ▁Rail ways ▁( K önig lich ▁Wür ttemberg ischen ▁Staats - E isen bah nen , ▁K W St . E .) ▁built ▁a ▁monument al ▁entrance ▁building ▁in ▁C rails heim , ▁as ▁it ▁was ▁the ▁seat ▁of ▁the ▁district ▁( ober amt ) ▁with ▁nearly ▁ 3 , 0 0 0 ▁inhabitants . ▁The ▁construction ▁work ▁continued ▁from ▁February ▁to ▁November ▁ 1 8 6 6 . ▁ ▁The ▁station ▁was ▁formally ▁opened ▁with ▁the ▁commission ing ▁of ▁the ▁Upper ▁Jag st ▁Railway ▁on ▁ 1 5 ▁November ▁ 1 8 6 6 . ▁On ▁ 1 0 ▁December ▁ 1 8 6 7 , ▁the ▁State ▁Railway ▁completed ▁the ▁Hall – C rails heim ▁section ▁of ▁the ▁Koch er ▁Railway . ▁ ▁C rails heim ▁as ▁a ▁border ▁station ▁ ▁On ▁ 1 2 ▁December ▁ 1 8 6 8 , ▁the ▁Bav arian - W ür ttemberg ▁treat y ▁was ▁signed , ▁which ▁provided ▁for ▁the ▁construction ▁of ▁the ▁N ure m berg – C rails heim ▁railway . ▁The ▁line ▁was ▁completed ▁on ▁ 1 5 ▁June ▁ 1 8 7 6 ▁with ▁the ▁completion ▁of ▁the ▁D omb ühl – border – C rails heim ▁section . ▁As ▁a ▁result , ▁C rails heim ▁station ▁won ▁addition ▁importance ▁as ▁a ▁border ▁station . ▁ ▁The ▁station ▁building ▁received ▁a ▁three - story ▁extension ▁in ▁ 1 8 7 4 – 1