This is a beautiful sheet of 4 stamps, issued by Burundi in 2011, featuring African personalities including Nelson Madela and Wangari Maathai. This sheet also depicts butterflies and minerals. The sheet is Michel catalog #2246-9/ Bl. 185, and is Post Office fresh, mint never hinged, and F/VF. Click here to visit my eBay Store for other auctions and Direct Sale items: