Question juridique clé
Whether the claimant proved the amount of damage caused by the loss of the painting under Art. 42 CO.
Solution extraite
The claimant had not provided enough timely and reliable evidence to permit a reasonable valuation of the painting at the relevant time, so damage compensation could not be awarded beyond the proven basis.
Motifs extraits
Art. 42 CO still requires the injured party to furnish, as far as possible, all available elements for valuation. The offered evidence was disparate, the auction-style offer in New York did not establish market value, and the late evidentiary offers could validly be disregarded under cantonal procedure.