Lorenzo Lotto
Madonna with Child and angels (madonna del latte). Around 1515-1520

While in the Hermitage collection this painting was held to be a work by Leonardo, later Waagen attributed it to Cesare da Sesto, while Cavalcaselle attributed it to Lotto – an early work by the master, thought to have been painted in Bergamo. Thanks to the restoration work carried out in the Pushkin Museum in 1981, the figures of two angels were revealed in the picture, which had previously been concealed by over-painting.

About restoration
Go to the full description on "Italian painting in VIII-XX centuries" catalogue.