abstract:Pierre Joseph Rossier (16 July 1829 – between 1883 and 1898) was a pioneering Swiss photographer whose albumen photographs, which include stereographs and cartes-de-visite, comprise portraits, cityscapes, and landscapes. He was commissioned by the London firm of Negretti and Zambra to travel to Asia and document the progress of the Anglo-French troops in the Second Opium War and, although he failed to join that military expedition, he remained in Asia for several years, producing the first commercial photographs of China, the Philippines, Japan and Siam (now Thailand).