This article attempts to list the oldest extant, freestanding buildings in the state of Wisconsin. Some dates are approximate and based on architectural studies and historical records; other dates are based on dendrochronology. All entries should include citation with reference to: architectural features indicative of the date of construction; a report by an architectural historian; or dendrochronology. If the exact year of initial construction is estimated, it will be shown as a range of dates.
To be listed here a site must: date from prior to 1840; or be the oldest building in a county, large city, or oldest of its type (church, government building, etc.).
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