The tower is repainted every 7 years to protect it from corrosion, making use of 60 lots of paint in three shades of brownish
https://www.mediafire.com/file/5f2f1pibio1fem7/pdf-80281-76518.pdf/file
The tower is repainted every seven years to safeguard it from corrosion, using 60 lots of paint in 3 tones of brown.