Tintoretto, The Last Supper

16th century
Church of San Moisè, Venice

One usually trustworthy blogger has identified this as a Tintoretto, and others online sources as by Palma il Giovane. It is not among the Tintorettos or the Palmas at the Web Gallery of Art. It does have the dog and the busy activities seen in Tintoretto Last Suppers.

This image in full resolution
More of the Last Supper

Photographed at the church by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.