Leche ("Door of the Milk") on the west side of the building has Gothic details dating from 1475. Among the most notable monumental Christian-era portals are the Puerta de las Palmas, the Puerta de Santa Catalina, and the Puerta del Perdón. The Puerta de las Palmas (Door of the Palms) is the grand ceremonial gate from the Courtyard of the Oranges to the cathedral's interior, built on what was originally a uniform façade of open arches leading to the former mosque's prayer hall. Originally called the Arco de Bendiciones (Arch of the Blessings), it was the setting for the ceremonial blessing of the royal flag, a ritual which was part of a Spanish monarch's coronation ceremony. Its current form dates from the restoration and remodelling done by Hernán Ruiz I in 1533, who created a plateresque façade above the doorway. The facade's statues depict the Annunciation while, unusually, the smaller figures in the lower corners depict mythological creatures. The Puerta de Santa Catalina (Door of Saint Catherine) is the main eastern entrance to the Courtyard of the Oranges. Its name referred to the presence of a nearby Convent of Saint Catherine. Its current appearance dates from the work of Hernán Ruiz II, who took over work on the cathedral in 1547 after the passing of his father (Hernán Ruiz I). The gate has a Renaissance façade on its exterior: the doorway is flanked by two columns and is surmounted by a serliana-style composition of columns forming three alcoves topped by a curved lintel. Within the three alcoves are the remains of three murals depicting Saint Catherine (Santa Catalina), Saint Acisclus (San Acisclo) and Saint Victoria (Santa Victoria). The Puerta del Perdón (Door of Forgiveness) is one of the most ritually important doors of the cathedral, located at the base of the bell tower and directly opposite the Puerta de las Palmas. A gate existed here since the Islamic period; its location is aligned with the mihrab of the mosque and with the central axis of the building before Al-Mansur's expansion. Its first reconstruction in the Christian period of the building dates to 1377, but it has been modified several times since, notably by Sebastián Vidal in 1650. The faded mural paintings inside the blind arches above the outer doorway include a depiction of Our Lady of the Assumption in the middle, with Saint Michel and Saint Raphael on the sides.