Located in central Sonoma County and laid out in the 1950s, family-friendly Rohnert Park (pop. 40,971) was one of the first planned communities nationwide. The jewel in the Green Music Center crown is the acoustically superb 1,400-seat Joan and Sanford I. Weill Hall concert venue. Modeled after Seiji Ozawa Hall at Tanglewood, Weill Hall includes a back wall that can be fully opened onto a landscaped and terraced lawn, to expend the audience capacity for summer concerts.