The document provides a history of the Loop neighborhood in Chicago, including its origins as a trading post in the late 18th century and growth during the Civil War and with the construction of skyscrapers in the 1880s. It established itself as the transportation and historic core of the city with the completion of its integrated transportation system in 1897. Demographic information indicates a median household income of $93,745 and population density of over 9,000 people per square mile. Major attractions mentioned include the Chicago Theatre, Chicago Cultural Center, Millennium Park, and shopping, dining, and historic areas along State Street, Washington Street, and Wabash Avenue.