Work began in November 2006 and was completed in August 2009. The project was carried out alongside the Master Builder of the Cathedral, Alfonso Jiménez Martín.
- All research and replacement work was carried out without shoring the vaults and without affecting the cathedral's daily activities, services, visits, etc. An innovative banding and shoring system was used on the pillars, ensuring maximum safety whilst work was carried out.
- An auscultation system was used throughout, this allowing the movements of and stress on the pillars, bands and shorings to be monitored. The columns were put into place with the help of jacks.