The tower is painted every seven years to shield it from deterioration, making use of 60 lots of paint in three shades of brownish

https://www.mediafire.com/file/j3cjf6o1uu66qx8/pdf-51127-86192.pdf/file

The tower is repainted every seven years to protect it from deterioration, making use of 60 tons of paint in 3 tones of brownish