Meet the Artist Katherine Vacca at a free demonstration on Saturday, July 1 as she creates a path to the beach in watercolor. The demo is held at The Art Gallery of the Guild of Harwich Artists, 551 Main Street (Rte. 28) in Harwich Port (508-432-1012). Paintings by Katherine and 23 other artists are on display and for sale at the gallery. Free parking across the street at the Tourist Information Center.