Titian, Tintoretto, Veronese in Boston

. BOSTON: Some years ago in Venice, I found myself in the early evening in Piazza San Marco looking at a banner proclaiming an exhibition of paintings by Tiziano at the Palazzo Ducale, the Doge's Palace. I happened to be facing the Palazzo, and the ticket booth happened to be not more than 50 feet away. By some small miracle it had no line. The ticket seller explained that entry was by timed