The original vault was painted in the 1480s and occupied the upper part of the current chapel of San Jerónimo.
In the middle of the 18th century, the height of the nave used for the chapel was increased, leaving the painting hidden in a chamber of about four meters between the roof of the building and the new vault of the chapel.
In the 1950s the paintings were removed from the original vault, transferred to canvas and moved to their current location (University Museum in the Minor Schools) for contemplation.
The painting is an astrological representation[2] (signs, constellations the Sun and Mercury) following the iconography of the Poeticon Astronomicon.
[3] It was inspired by the chair of astrology that had recently been established (c. 1460) at the University of Salamanca.