Which preposition to use with courthouse

on Occurrences 3%

And in no Courthouse on a book will I swear To injure a poor fellow-creature.

in Occurrences 2%

"My mother and me war put on de block in front of de Courthouse in Hopkinsville and sold to Mr. Newt.

at Occurrences 1%

A Member of the R.I.C. JURISPRUDENCE A COMEDY IN ONE ACT Scene: Room in courthouse at Ballybraggan.

of Occurrences 1%

Then he renewed his labors at the courthouse of the older county from which Brummell was formed in 1750, and through many fragmentary, evil-odored and unindexed volumes indefatigably pursued the family's fortune back to the immigration of its American progenitor in 1619,and, by the happiest fatality, upon the same Bona Nova which enabled the first American Musgrave to grace the Colony of Virginia with his presence.

with Occurrences 1%

There is a postoffice with a tower and a clock, a courthouse with a fountain and a cannon, a park with a bandstand and a baseball diamond, a townhall with a belfry and no bell, an exhaustive array of churches, the Imperial Hotel, and the market.

Which preposition to use with  courthouse