sentences:  These traverse the soil to the underlying bedrock and float on roller bearings able to withstand a Richter scale magnitude 10 earthquake.As construction work neared completion, the operation to move the historic artifacts the distance from the Acropolis rock to the new museum started in October 2007, took four months, and required the use of three tower cranes to move the sculptures across the distance without mishap.Greek officials expressed their hope that the new museum will help in the campaign for the return of the Parthenon Marbles.