Katharine Albritton

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Art marketarchive

Joe Simon-Whelan's Warhol authenticity claim over

Simon-Whelan says he lacks the financial resources to pursue his case

'The Gonzaga Tapestries: from Mantegna to Raphael and Giulio Romano' goes on show in Mantua

The surviving tapestries come together at the Museo Civico Palazzo del Tè from 14 March - 27 June

Sotheby'sarchive

Sotheby’s sues technology entrepreneur for non-payment

Defendant says auction house did not disclose its ownership of painting