János balassa (1814-1868), surgeon and member of the hungarian academy of sciences. Portrait painting by mihály kovács formerly in the headquarters of the budapesti királyi orvosegyesület (budapest royal society of physicians). Object Type: painting. Date: 1851. Dimensions: 34.3 x 28.2 cm. Medium: oil on cardboard. Collection: Semmelweis Museum of Medical History. Kovács Mihály Balassa János