There are records which attest the presence of the Guicciardinis in Val di Pesa where the family owns the castle of Poppiano. Though we are unable to ascertain even older origins, there is however speculation that the family descends from the Lombard Suavizzis.
One Guicciardino of Mercatante is a Member and Consul of the Silk Manufacturers Guild of Florence. The family purchases a tower, which is later expanded into the current Palazzo Guicciardini.
Sozzo Guicciardini, Captain of San Miniato and Podestà (chief magistrate) of Pistoia, takes part in the battle of Montecatini.
Niccolò Guicciardini ambassador at the court of Clement VI informs the Pontiff of the banishment of the Duke of Athens.
Luigi Guicciardini is gonfaloniere during the Revolt of the Ciompi: on this occasion he is deposed from office due to ineptitude. Subsequently, he gains success as ambassador to the Duke of Anjou.
Piero Guicciardini, three times gonfaloniere and friend of Cosimo the Elder, is named Count Palatine by Emperor Sigismund who signs the grant at Aachen.
Jacopo Guicciardini, close to Lorenzo the Magnificent, is commissioner in the army during the war against Pope Sistus IV and the King of Naples, which ensued from the Conspiracy of the Pazzi. One of the conspirators, Francesco Salviati, Archbishop of Pisa, is hanged from the windows of Palazzo della Signoria.
During Savanarola's second Florentine period, Piero, the son of Jacopo Guicciardini is fascinated by the Dominican's sermons and becomes a moderate supporter. One of his noteworthy political assignments, is that of Sea Consul with ample and special authority on the jurisdiction of Pisa. He is fluent in ancient Greek and attends the Platonic Academy of Marsilio Ficino. It is Ficino who will be godfather to Piero's third-born, Francesco the historian.
The Sack of Rome. Francesco di Piero Guicciardini is lieutenant general to Clement VII and author of the League of Cognac. During the wars of Italy he is one of the European political leaders. Among his many ventures, we would like to remember the courage and selflessness shown in his defence of Parma in 1522. He spends the last years of his life waiting for the publication of the History of Italy.
In the XV and XVI the Guicciardinis have trading branches in Lyons, Antwerp, London and Naples. In 1541 Vincenzo Guicciardini, a Florentine merchant, resides in London and in 1564 becomes Florence's Consul to London; on 15 September 1558 he marries Lucrezia Bruschetto (Bryskett), the daughter of a wealthy Genoese merchant: Winston Churchill is one of their descendants.
28 May: Girolamo Guicciardini, brother of the historian, purchases the villa at Lucignano for 700 scudi (silver coins), then known as Bonorlo. The deed is drawn up by Ser Bernado Gamberelli. The family has been producing oil and wine ever since.
Lodovico Guicciardini, Francesco's nephew, publishes at Antwerp important works on the history and geography of the Low Countries (Benelux).
Death of Agnolo, son of Girolamo Guicciardini, ambassador to Queen Caterina de' Medici; he edits a purged version of the Decameron, as well as the first edition of the History of Italy (1561). He marries Contessina Ridolfi, Lorenzo the Magnificent's niece. The present day Guicciardinis are his descendants.
Piero, son of Agnolo Guicciardini, ambassador to Henry IV (1609) and to the Pope, takes an interest in the events concerning Galileo during the Copernican controversy (1616). He is elected Marquess of Campiglia in Val d'Orcia.
Death of Lorenzo son of Francesco Gaetano Guicciardini. The main branch of the family descends from Lorenzo's eldest son Francesco. We descend from his younger brother, Ferdinando, maggiordomo maggiore to the Infanta Maria Luisa Duchess of Lucca (1817-1824).
Piero Guicciardini, who belongs to the main branch of the family, is exiled in England for his religious views which aim to reawaken radical evangelism in Italy. He befriends the Plymouth Brethren.
Our great-grandfather Lodovico Guicciardini marries "Frankey" Corsi Salviati, Lady in Waiting to H.M. Queen Margherita of Savoy. He sets up the "Fattoria Conte Lodovico Guicciardini" and renovates the cellar. In accordance with his father-in-law's will, Bardo Corsi Salviati, Lodovico's only son, Giulio, acquires the surname Guicciadini Corsi Salviati (Royal decree dated 26 February1911) and the title of Marquess of Montepescali (Royal Decree dated 27 March1913).
Our grandfather, Giulio Guicciardini Corsi Salviati, a keen photographer, scholar and expert trustee of an extensive estate, renovates the garden of Villa Corsi Salviati at Sesto Fiorentino on which he publishes an essay (Olschki, 1937).
On the death of our grandfather Giulio, our father Lodovico, an engineer and naval officer, as well as a volunteer in the Italian Liberation Corps after 8 September 1943, modernizes the vineyards.
On the death of our father, our mother Antonella Bombicci Pontelli (first cousin to Girolamo and Roberto Guicciardini) skilfully manages the farm and upon her death in 2011 we, the children, inherit the estate.
The Guicciardini family have been in Val Pesa for at least nine centuries. A 12th century document mentions a certain Guicciardini Lord of a castle in Poppiano. The castle, which has undergone several refurbishments, still belongs to the family. In the 13th century the Guicciardinis purchase a tower in Florence in the street which today bears their name, and where in later years the palazzo belonging to the main branch of the family was built. The Guicciardinis rise to become part of the city's political intelligentsia: they number 44 priori, 16 gonfalonieri and 12 senators. In 1416 the Holy Roman Emperor, Sigismund of Luxemburg, grants Piero Guicciardini and his male descendants the title of Count Palatine. The historian and moralist Francesco (1483-1540) is the most illustrious member of the family, as much for his intellectual legacy as for his political role during the unfortunate years of the Italian wars, starting in 1512 with the Spanish Legation at the Court of Ferdinand the Catholic and ending with the Sack of Rome in 1527. As of this date the Guicciardini's great political era comes to an end, even though they continue to enjoy certain prestige under the Medicis and the Lorenas: it is no accident that one of the first senators to be nominated by the Medicis is a member of the Guicciardini family.
In the 19th century distinguished members of the family include Piero (1808-1886), a prominent representative of the Evangelical "Revival" in Italy, and Francesco (1851-1915), Mayor of Florence, minister for Agriculture and Foreign Affairs.