Seydou Keïta Seydou Keïta, Untitled, 1952-56, Gelatin Silver Print, cm 60 x 50. Seydou Keïta, Untitled, 1956-57, Gelatin Silver Print, cm 50 x 60. Seydou Keïta, Untitled, 1949-51, Gelatin Silver Print, cm 60 x 50. Seydou Keïta, Untitled (The Twins) 1956-57, Gelatin Silver Print, cm 50 x 60 See selected exhibitions.