Uncle Cent moved to Paris in 1858 and took residence at 9 Rue Chaptal, which housed Goupil's headquarters, too. In 1861, he became partner of Goupil &amp; Cie. As Uncle Cent had no children, his nephews were evidently supposed to follow him up in the firm: Vincent entered in 1869, Theo in 1873. When Vincent was sacked by Léon Boussod in 1876, the balance between the shareholders suffered - and so Theo got his chance. Called to the Paris office for the time of the World Fair 1878, he was offered to stay in Paris. Between 1881 and 1890, Theo was manager of Goupil &amp; Cie's branch on Boulevard Montmartre, from which he sold about 1,000 paintings, including works by members of the Barbizon School like Corot and Daubigny.