Around the year 1272, the height of the tower in add again to be 4 floors. In the fourth development is done in the opposite direction with the hope to be back again as before, but unfortunately development should be stopped again.

Until 80 years later in 1360 rebuilding and at the stage of construction in the wake of a room located at the top of the Tower of Pisa.

Due to the unstable soil conditions and this is so whatever the efforts of the Tower of Pisa will remain oblique. Currently there is still information about the Tower of Pisa that can still be done, such as the support Tower of Pisa which previously used a conglomerate stone do 150 with a beam of concrete that can be resisted using steel cable.

Then around in 1999 made a final improvement to stabilize the tower building by doing the excavation and removal of land under the foundation of the Tower of Pisa in hopes of lowering its slope. Investigate some words from some experts, the Tower of Pisa will be able to survive until three to three centuries again.