Real Estate Industry Overview, Types of Real Estate, Careers One of the largest initial real estate deals in history known as the “Louisiana Purchase” happened in 1803 when the Louisiana Purchase Treaty was signed. This treaty paved the way for western expansion and made the U.S. the owners of the “Louisiana Territory” as the land was bought from France for fifteen million, making each acre roughly 4 cents. For real estate sold after the annual July billing and before the bill becomes delinquent in January, a statement for the unpaid tax will be mailed to the new owner. A grant…