Six days after the death of Georg Baselitz , his longtime dealer Thaddeaus Ropac opened an exhibition in Venice this week that the artist had already accepted would be his last.  At the Fondazione Giorgio Cini on the island of San Giorgio Maggiore, “Eroi d’Oro ”  (“Heroes of Gold”) brings together the final paintings Baselitz made in his lifetime. He died in April at 88 , and in a prerecorded film made for the show, he refers to the works without hesitation as “my last paintings.” He says he intended them as a kind of “summation” of everything he had done. Related Articles When  ARTnews  spoke to Baselitz just days before his passing, he was even more direct. “I have a long biography to look back on,” he said. “I have painted an incredibly large number of pictures over the course of more than 60 years.…