The statues known as Mariblanca are female figures of uncertain origin which may relate to the fertility goddesses Venus or Fortuna.
The name, which is common in Spanish relates to a statue which was purchased in the year 1625 by a Florentine merchant Ludovico Turchi as a gift to crown the lost Fountain of Faith in Madrid.
It is now the only element that remains of this monumental fountain, which was located on the church of Good Faith, which formerly stood in the Puerta del Sol.
Wikipedia https://en.wikipedia.org/wiki/Mariblanca
Address 9 Plaza de la Puerta del Sol, Madrid 28013, Spain
Coordinates 40°25'0.704" N -3°42'16.39" E