Palazzo Strozzi  is the finest examples of Renaissance domestic architecture and overall appears, according to the will of its owner, Filippo Strozzi, as a small fortress in the heart of the city.
Filippo Strozzi the Elder was orphaned when he was seven years old because his father was banished into exile for the alliance with Palla Strozzi and the faction of the Albizi against Cosimo de’ Medici. He spent his adolescent years in Florence, but the financial difficulties caused by the retaliation of the Medici, had plunged his family, once one of the richest and eminent of Florence, in a situation so bitter that he can not even effort an adequate education. For this he was only thirteen when he left the city in search of money and a position that would allow him to re-legitimate its familiar name.
He went to Palermo where he was educated by a friend of his father and then he moved to Naples where he was appointed officer of the Medici Bank in Naples.
Thanks to his ability as a banker Filippo obtained the privilege by Ferdinand I of Naples to conduct private business in his kingdom, becoming so influential in the affairs of the Neapolitan court as to ask to Florence, after the death of Cosimo, by letters to Piero de ‘Medici, his return to the city. With the armistice in September 1466 Filippo was finally able to return legally to Florence, with full rights, which included the ability to hold public office.
Back in Florence Filippo Strozzi desired to build the most magnificent palace to assert his family’s continued prominence and the complete rehabilitation his own political status.
The first stone of the building was thrown at dawn on August 6, 1489 by the will of Filippo Strozzi. The palace was designed by Benedetto da Maiano and Giuliano da Sangallo. The construction was directed by Simone Pollaiuolo. Filippo Strozzi died before the palace was completed, and it was his sons to live there for the first time around 1505.
The foundation’s chart
The time for laying the foundation-stone was fixed by a horoscope by Messer Benedetto Biliotti, Maestro Niccolò, and Messer Antonio Benevieni, doctors; also Bishop Pagagnotti and Messer Marsilio Ficino, who all confirmed it as lucky.
says Alfred von Reumont in his book “Lorenzo de Medici, the Magnificent”.
The Sun is rising at the horoscope in his domicile in Leo, in the bounds of Mercury. Furthermore the Sun is in trine with Jupiter in Aries. The Moon is waxing in Sagittarius with the Lot of Fortune. She has a southern latitude but she is raising in latitude which is quite good in a building election. She is moving from the square of Mercury to the trine of the Sun.
Mercury is in its domicile and exaltation in Virgo in the II place. Since the horoscope is in the bounds of Mercury and the Moon is transferring the light of Mercury to the Sun which is also in the bound of Mercury, Mercury is a distinguished actor. So the Sun benefits from Mercury, the planet of bankers and financial business, and is helped to shine even brighter to show the wealth and prestige of the Strozzi family.
Moreover the Moon is in the Al Baldah moon mansion: the City or District, which is favorable for harvest, gain, buildings, and travelers. Also the horoscope is in a favorable lunar mansion for building: Al Jabhah, the Forehead which strengthens buildings, promotes love, benevolence, and help against enemies.
But the most important element in the foundation chart is the star Regulus rising at the horoscope with the Sun.
The star Regulus rising with the Sun is a sign of great eminence. Jean Stade says that Regulus rising or culminating with the Sun, Jupiter, the Moon or alone promises an increase in dignity.
Regulus shining with the dawning Sun reveals the majestic and solid elegance of the Palace and makes long lasting the memory of the Strozzi family.
1 Palazzo Strozzi web site Palazzo Strozzi