Image by Mario Garcia Torres, Je ne sais si c’en est la cause, 2009. Courtesy of the artist, Jan Mot, Brussels, and the Hirshhorn.

Fotoweek DC continues to roll throughout the week with exhibits and events too numerous to count. Browse through the Fotoweek DC website for information on exhibit openings and closings, NightGalleries and their daily picks on the blog. If all of that is too much for you, feel free to refer to our picks for the remainder of the week.

>> Washington Project for the Arts celebrates 35 years with Catalyst, an extensive exhibit of the organization’s history. Featuring works by over 100 artists, the exhibition celebrates the catalytic power of the WPA and the artists who benefited from the organization’s support and encouragement. American University Museum at the Katzen Arts Center. Opening reception on Saturday. 6 to 9 p.m.

>> Tonight at the Hirshhorn, meet artists Mario Garcia Torres and Cyprien Gaillard as they discuss their work on the “ruins of the 20th century” in the new exhibit Directions, which also opens today. 7 p.m.

>> In the WIP Lab at Artisphere, see FOLDING/UNFOLDING : COLLIDER. The exhibit, inspired by the gypsum crystals of the Naica Mine in Mexico, will present the geometry of basic crystal forms, and cutting-edge 3D modeling technologies in a fascinating intersection of art and science. Opening reception on Saturday. 8 to 11 p.m.

>> What happens when you have ten photographers and ten visual/street artists create art? Likeness at Honfleur Gallery answers that question with ten original portraits and ten interpretations of that portrait. Opening reception on Thursday. 6 to 8 p.m.

>> Food, friends and a slideshow? That’s the idea behind Slideluck Potshow. Bring a dish to share and settle in for an evening of artists presenting their work in this casual, yet creative atmosphere. Friday, 7 p.m. $10.

>> On Thursday, the National Building Museum will be offering special tours of its historic home. Originally built in the 1880s as an office for the U.S. Pension Bureau, tours will highlight the history of the pension building, as well as architectural features designed to honor veterans and accommodate the wounded veterans as they navigated the building to collect their pensions. Five tours given throughout the day. Registration is not required.