Question: ] Prime House is a historic home located across the street from a Museum provides a dynamic schedule of changing exhibitions on what?

Context paragraphs:
Washington County Museum of Fine Arts: Washington County Museum of Fine Arts (WCMFA) is an art museum located in Hagerstown, Maryland, United States.  The building is located off Park Circle and serves as a centerpiece in Hagerstown City Park.  The museum was donated in 1929, by Mr. and Mrs. William Singer, Jr.  It was completed in 1931, and two wings were added in 1949.  The museum provides residents and visitors with access to a nationally-recognized permanent collection and a rotating schedule of exhibitions, musical concerts, lectures, films, art classes and special events for children and adults throughout the year.  The collections include 19th & early 20th Century American Art, Old Masters, and Decorative art.

Thomas McLean House: Thomas McLean House is a historic home located at Battenville in Washington County, New York.  It was built between about 1795 and 1867 and consists of a five-bay, 2-story main block with two 1 ⁄ -story wings.  Also on the property are two timber-frame barns, a 1-story commercial building, shed, and remains of a stone foundation.  It is located across from the Stoops Hotel.

Prime–Octagon House: The Prime–Octagon House, built in 1859, is a historic octagonal house located at 41 Prime Avenue in Huntington, Suffolk County, New York.  The house is next door to the 1855-built Prime House, and across the street from the Heckscher Museum of Art.

Robert Young House: Robert Young House is a historic home located in East Fallowfield Township, Chester County, Pennsylvania.  It was built in 1856, and is a two-story, three bay, brick dwelling with a gable roof in the Federal style.  It features separated chimneys and Palladian windows in the gable ends.  The house was built for Robert Young, owner of the White Horse Tavern located across the intersection.

Jason Russell House: The Jason Russell House is a historic house in Arlington, Massachusetts, the site of the bloodiest fighting on the first day of the American Revolutionary War, April 19, 1775 (the Battle of Lexington and Concord).  The house was purchased in 1923 by the Arlington Historical Society which restored it in 1926, and now operates it as a museum from mid-April through the end of September, together with the adjoining Smith Museum, built in 1981 to house changing exhibitions of life in Arlington.

Lucius Gleason House: The Lucius Gleason House, also known as Liverpool Village Hall and as the Gleason Mansion, is a historic home located at Liverpool, Onondaga County, New York.  It was built about 1860, and is a large two-story, Italianate style, stuccoed brick dwelling.  It has a telescoping plan with a two-story, hip roofed main block; followed by a smaller two-story, gable roofed wing; and a 1 1/2-story gabled appendage.  The Gleason Mansion is now home to the Liverpool Village Museum and Historian's office.  Operated by the Liverpool Historical Association, the museum features changing exhibits about local history.

Mill House (Milford, Delaware): Mill House is a historic home located at Milford, Kent County, Delaware.  The house is located across from the Parson Thorne Mansion.  It is a late-18th century, two-story, three bay, brick dwelling with a frame rear wing.  It has a 2/3 Georgian side hall plan.  It was owned by Delaware Governor Peter F. Causey (1801-1871) and was a rental property for the family.

Prime House: Prime House is a historic home located at Huntington in Suffolk County, New York.  It is a 2 ⁄ -story, five-bay, gable-roofed clapboard structure with a shed roof rear extension.  It was built as a two-family workers' residence in 1855 and was representative of the late settlement period of Huntington.  The house is next door to the Prime-Octagon House, and across the street from the Heckscher Museum of Art.

Heckscher Museum of Art: The Heckscher Museum of Art is located in scenic Heckscher Park, in Huntington, New York, within walking distance of downtown shops and award-winning restaurants.  The Museum provides a dynamic schedule of changing exhibitions on American art.  Additionally, public programs for adults, families, and children, include "First Friday" concert series, gallery talks, festivals and workshops.

Center for Maine Contemporary Art: Founded in 1952, the Center for Maine Contemporary Art (CMCA) is a contemporary arts institution, presenting a year-round program of changing exhibitions featuring the work of emerging and established artists with ties to Maine.  In addition, CMCA offers a full range of educational programs for all ages, including gallery talks, performances, film screenings, and hands-on workshops.  In 2016, CMCA opened a newly constructed 11,500+ square foot building, with 5,500 square feet of exhibition space, designed by architect Toshiko Mori.  Located in downtown Rockland, Maine, across from the Farnsworth Art Museum and adjacent to the Strand Theatre, the new CMCA has three exhibition galleries, a gift shop, a lecture hall, an ArtLab classroom, and an open public courtyard.

Supporting paragraphs: Prime House Heckscher Museum of Art
Answer: American art