Rome, March 1 - Signs promoting the candidacy of Ghana's Cardinal Peter Turkson for pope have begun popping up all over Rome in an apparent spoof. The signs, which read 'Vote Turkson', are styled after Italian political campaign posters during elections, which took place across the country earlier this week. According to some bookmakers, Turkson is favored to succeed Benedict XVI, who spent his first day as pope emeritus Friday after stepping down Thursday in a move unheard of in 600 years. Campaigning for pope is strictly forbidden by conclave rules. The conclave of cardinals to elect a new pope may begin as soon as next week. Speculation has been heavy that the successor to the throne of St Peter will come from Africa or Latin America, where the Catholic Church is growing the most.