 With their partisans fighting in the streets, Henry was also confronted with the news that the Castel Sant'Angelo and the Vatican quarter were securely in the hands of Robert, the Angevin king of Naples, who had decided, with help from the Florentines that his own dynastic interests were not in favour of renewed Imperial presence in Italy.On May 7, Henry’s German troops forced their way across the Ponte Milvio and entered Rome, but found it impossible to throw out the Angevin troops from around St Peters Basilica.As the Colonna family had possession of the area around the Basilica of St. John Lateran, Santa Maria Maggiore and the Colosseum, Henry was forced to perform his coronation on 29 June 1312 at the Lateran.