period. Many of its members lived during other parts of the year in Greenwich Village in New York, and intellectual and artistic connections were woven between the places. In 1898 Charles Webster Hawthorne opened the Cape Cod School of Art, said to be the first outdoor school for figure painting, in Provincetown. Film of his class from 1916 has been preserved. The town includes eight buildings and two historic districts on the National Register of Historic Places: Provincetown Historic District and Dune Shacks of Peaked Hill Bars Historic District. In the mid-1960s, Provincetown saw population growth. The town's rural character appealed to the hippies of the era; property was relatively cheap and rents were correspondingly low, especially during the winter. Many of those who came stayed and raised families. Commercial Street, where most of the town's businesses are located, gained numerous cafés, leather shops, and head shops. By the 1970s, Provincetown had a significant gay population, especially during the summer tourist season, when restaurants, bars and small shops serving the tourist trade were open. There had been a gay presence in Provincetown as early as the start of the 20th century as the artists' colony developed, along with experimental theatre. Drag queens could be seen in performance as early as the 1940s in Provincetown. In 1978 the Provincetown Business Guild (PBG) was formed to promote gay tourism. Today more than 200 businesses belong to the PBG and Provincetown is perhaps the best-known gay summer resort on the East Coast. The 2010 US Census revealed Provincetown to have the highest rate of same-sex couples in the country, at 163.1 per 1000 households. Since the 1990s, property prices have risen significantly, causing some residents economic hardship. The housing bust of 2005 - 2012 caused property values in and around town to fall by 10 percent or more in less than a year. This did not slow down the town's economy, however. Provincetown's tourist season has expanded, and the town has created festivals and week-long events throughout the year. The most established are in the summer: the Portuguese Festival, Bear Week, and PBG's Carnival Week. In 2017, a memorial was dedicated to those who lost their lives to AIDS. Historic transportation For nearly all of Provincetown's recorded history, life has revolved around the waterfront − especially the waterfront on its southern shore − which offers a naturally deep harbor with easy and safe