Jerseyville, the county seat of Jersey County, is out in the country north of St. Louis, but I still lumped it in with the Metro East due to its proximity to the city. The courthouse, the third one on the site, was designed by Henry Elliott of Chicago.
Erected in 1893, which the front façade helpfully tells us, it is a classic example of the Richardsonian Romanesque, and is in excellent condition. The central tower is perhaps a bit more Gothic Revival, though.
The rusticated stone created a heavy, massive feeling to the building.
The nearby U.S. Route 67 has a plethora of well-preserved buildings, many of which are in the Italianate style and other related movements.
There has been some meddling with the cornices, and slipcovers added to some.
I like this interesting one story storefront below.