 In 1841 , the commissioners again settled on Hartford as the location for the county seat , and planning for Blackford County ’ s original courthouse began . On September 11 , 1841 , the Blackford County board of commissioners ordered that written proposals should be received to build a courthouse on the public square in the town of Hartford . The building was to be 40 feet ( 12 m ) square , 25 feet ( 8 m ) high , and built of brick on a stone foundation . The courthouse grounds occupied 1 @.@ 5 acres ( 0 @.@ 6 ha ) instead of the 1 acre ( 0 @.@ 4 ha ) proposed in 1839 . 
