Old Lyme is a community of about 7,500 permanent residents, in addition to several thousand seasonal vacationers who occupy a seaside community of summer residences. It is located on the east bank of the Connecticut River at its confluence with the Long Island Sound, across the river from Old Saybrook on the West Bank. The town is marked by independence, volunteerism, and a long-standing commitment to the arts. Numerous examples of Colonial and Federal architecture can be found throughout the town. The US headquarters of Sennheiser is located in Old Lyme, as is Callaway Cars, the Florence Griswold Museum (including the Florence Griswold House), the Lyme Academy College of Fine Arts, and the Lyme Art Association. Old Lyme and its neighboring town Lyme are the namesake for Lyme disease.