Early in the 18th century Dover grew rapidly and in 1777 was declared the capital of Delaware. At that time, a number of stately homes were built around The Green on State Street, many of which are still standing today in almost original condition. Within walking distance from this historic area are Delaware State museums, such as the Johnson Victrola Museum, which houses a large collection of phonographs. Art enthusiasts appreciate the Biggs Museum of American Art, where local and national artwork dating back 200 years is on display. Every Tuesday and Friday Spence's Bazaar takes place. Visitors and locals alike attend this flea market, including many Amish who travel to the market in horse-drawn carriages to sell their produce. Two weekends each year, the Dover International Speedway hosts Nascar stock-car races that attract over 100,000 spectators.