(ANSA) - ROME, NOV 13 - Rome's 'Protestant Cemetery', where English Romantic poets Keats and Shelley are buried along with Marxist writer Antonio Gramsci and many other prominent non-Catholics like cult crime writer Andrea Camilleri and two-time ex-Communist Italian president Giorgio Napolitano, has been closed due to safety concerns after one of its monumental pine trees fell down. (ANSA).