Sotheby’s has always used yellow chalk to mark pictures, which can offer some clues about a work’s past.
Christie’s has used a variety of marks since the 19th century, which allow you to see who has bought and owned a work over the course of its history.
Most classical Greek paintings that were famous in their day seem to have been of a size comparable to smaller modern works - perhaps up to a half-length portrait size.
However, for a generation in the second quarter of the fifth-century BC there was a movement, called the "new painting" and led by Polygnotus, for very large painted friezes, apparently painted on wood, decorating the interiors of public buildings with very large and complicated subjects containing numerous figures at at least half life-size, and including battle scenes.
We can only attempt to imagine what these looked like from some detailed literary descriptions and vase-paintings that appear to echo their compositions.
The first century BC to third century AD Fayum mummy portraits, preserved in the exceptionally dry conditions of Egypt, provide the bulk of surviving panel painting from the Imperial Roman period - about 900 face or bust portraits survive.
One of the things that's distinctive about him is his use of impasto. And what I like about this with you is the fact that you've had it in your family, on your wall. If I were to put an auction estimate on it, I would put it at 0,000 to 0,000. Value can change: The value of an item is dependent upon many things, including the condition of the object itself, trends in the market for that kind of object, and the location where the item will be sold.APPRAISER: Now, do you know anything about the artist at all? Around 1925 or so, he starts to really focus on the skiing paintings and the alpine paintings. What's interesting is that in this, he's able to have this bright white against the deep shadows here, and also he does this scene a number of times over and over again, and so this is called the Einsamer Berghof. And he's born in 1891, but he goes off to school to train as an architect, and he's friends with the famous Austrian artist Gustav Klimt, and Egon Schiele, two of the major Austrian architects.Panel painting is very old; it was a very prestigious medium in Greece and Rome, but only very few examples of ancient panel paintings have survived.A series of 6th century BC painted tablets from Pitsa (Greece) represent the oldest surviving Greek panel paintings.