Spain's Prado museum is hosting a large exhibition of European art lent by Russia's Hermitage, a rare opportunity to see such work outside the vast St. Petersburg museum.
A decades-long dispute between Russia and an Orthodox Jewish group over ownership of holy texts collected for centuries by influential rabbis and seized by the Soviet Union has jolted the U.S. art world, threatening an end to major cultural loans between the two countries.

A decades-long dispute between Russia and an Orthodox Jewish group over ownership of holy texts collected for centuries by influential rabbis and seized by the Soviet Union has jolted the U.S. art world, threatening an end to major cultural loans between the countries.