Even in a neighborhood of grand and spectacular homes, 108 8th Avenue is a standout. The Park Slope townhouse has the scale and level of stunning historic detail that is, as the listing boasts, rarely found in a private home. It is also quietly possessed of 21st-century luxuries like central air and meticulously tended outdoor spaces, making it an even rarer gem that’s now on the market for the first time in decades, asking $$8.8 million. Built in 1900, this limestone-clad mansion has a wealth of historic details like filigreed mahogany woodwork, original wood floors, delicately carved mantels and stained glass from world-renowned artists. Martin Scorcese’s “The Age of Innocence” and HBO’s “Boardwalk Empire” have made use of this opulent home to capture the essence of gracious living from a bygone era.