Vintage albumen print of the Richelieu Pavilion, Louvre Palace, Paris
 Printed in 1859, signed on card
 Baldus's photographic work is devoted to architecture and landscape and is marked by official commissions that made him one of Napoleon III's (1813-1889) favorite photographers. He is an official witness to his era through his numerous photographic works on the restoration of monuments and railway construction. Among other projects, he documented the reconstruction of the Louvre and the opening of the Paris-Lyon-Marseille railway line. Alongside Hippolyte Bayard (1801-1887), Henri Le Secq (1818-1882), Gustave Le Gray (1820-1884), and O. Mestral (1812-1884), he participated in the 1851 Heliographic Mission, commissioned by the Commission of Historical Monuments to compile an inventory of the most remarkable buildings in need of restoration in various regions of France.