This top level of the tower with its octagonal body was designed by the architect Hanequin de Bruselas, who was summoned to finish its construction with a group of accomplished masters: Egas Cueman, Enrique Egas and Juan Guas among others.
Mojster Martínez je ta del dela zaključil leta 1422, vendar pa ni zapustil nobene risbe ali načrta za gradnjo konice in zvonika.