An earthquake of magnitude 6 has struck about 35-Km north of Bologna in Italy in midnight.
It has caused extensive damages to the World Heritage sites apart from killing at least four persons and leaving more than 50 injured as reported in BBC dated 20th of May 2012.
Two of the dead were workers of a ceramics factory in Sant'Agostino – they got buried in the rubble when the walls collapsed.
Official reports indicate significant damages to the cultural heritage of the Emilia Romagna region.
The tremors were felt in the cities of Bologna, Ferrara, Verona and Mantua and even as far away as Milan and Venice.
It is believed to be the worst tremor in central Italy after 2009 when the L’Aquila quake had taken more than 300 lives.
The northern portion of Italy is prone to earthquakes.