Nigeria, June 15 -- Nigerian-born visual artist Njideka Akunyili-Crosby has painted the official portraits of former United States President Barack Obama and his wife, Michelle, for the Obama Presidential Centre.

The Obama Foundation built the Barack Obama Presidential Centre at 6001 S. Stony Island Avenue in Chicago, with its commissioning scheduled for 19 June.

The nearly 20-acre campus is far more than a museum; it houses art installations, a new library, a basketball court and a picnic area complete with grills.

Mrs Obama announced the portraits in a video posted to her Instagram page on Monday, showing her, Mr Obama and the 43-year-old artist walking through the library to where the painting hangs.

Speaking in the video, Mr Obama...