Johan Barthold Jongkind (1819-1891)The main gate of Rotterdam, panel dated 1859.21x27 cm. The work was appraised in 2016 by Kunsthandel Ivo Bouwman in The Hague. The work has now also been included in the archive of Comité Jongkind Paris - La Haye. In the book "Jongkind, Peintures I" Adolphe Stein, Brame & Larenceau Editions, 2003, page 130, there is a similar painting, dated 1860 "Leine Lure sur le Hoofdpoort à Rotterdam, 20x26 cm. Origin is private contribution.