The Evangelist Matthew by Jan Lievens is part of a new show of the artist’s work that opens this weekend at the National Gallery. (Photo courtesy the National Gallery of Art)

>> The Smithsonian American Art Museum might be holding the most interesting art event this weekend, with the alternate reality game “Ghosts of a Chance.” On Saturday from 12 to 5 p.m., head to the museum to play a scavenger hunt that will rid the museum of haunted spirits. The six “quests” can be played by people of all ages, but become increasingly difficult. “Ghosts of a Chance” was also an online game that 4,500 people across the country participated in, and artifacts made by participants will be on display. Clues are distributed via cell phone, so make sure you bring yours. And if all that still sounds confusing, click over to the web site for more information.

>> The National Gallery of Art continues their busy fall calendar with the opening of Jan Lievens: A Dutch Master Rediscovered on Sunday. A friend of Rembrandt, many of Lievens’ paintings were mistakenly attributed to the more famous artist, as they feature similar subjects and techniques. The show includes over 100 works by Lievens, who besides being a prolific painter, delved into printmaking and drawing. His works are bursting with action and feeling, and topics range from Biblical scenes to the five senses. Two opening lectures will be held on Sunday at 2 p.m. in the East Building Concourse Auditorium.

>> Civilian Art Projects opens two contemporary photography shows this weekend — the traveling exhibit DARFUR/DARFUR, which features photographs snapped by photojournalists on the Darfur crisis, and Pastime, which includes work by emerging photographers. The opening reception is Friday from 7 to 9 p.m.