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Fyi (for your information) Hermitage originated as a private collection of Catherine II. The collection housed in this building, so now it is called the Old Hermitage.
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The State Hermitage is a museum of art and culture with six buildings in St. Petersburg, Russia. Five of them are open to the public. They are the Winter Palace, Small Hermitage, Old Hermitage (in the postcard), New Hermitage and Hermitage Theatre.