Conti was born in 1591 at Rome, the son of Lotario Conti and his first wife Clarice Orsini. He was the grandson of another Torquato Conti and thus the nephew of Cardinal :it:Carlo Conti |Carlo Conti. His father suggested an ecclesiastic career and to that end he studied under the tutelage of Cardinal Odoardo Farnese, a relative of the wife of his grandfather Torquato, Violante Farnese. For reasons unknown, he instead volunteered in the army of the Spanish Empire. In 1616, Conti commanded a company of infantry against Charles Emmanuel I, Duke of Savoy in an unsuccessful attempt to maintain the Spanish occupation of Alba. Alba was retaken by the Duke of Savoy and Conti, having survived the battle, went to Germany.
Thirty Years' War
The development of Conti's military career generally followed the development of the Thirty Years' War and he fought in a number of early battles and sieges at the beginning of the war. In Germany, Conti commanded the Italian volunteers fighting for Ferdinand II, who in 1619 became Holy Roman Emperor. Conti was promoted to Lieutenant Colonel and Regimental Chief in the interceding years before commanding troops loyal to Charles Bonaventure de Longueval, Count of Bucquoy first at the Siege of Pilsen and then at the Battle of White Mountain in 1620. He continued with Count of Bucquoy and commanded troops during the Siege of Érsekújvár where Bucquoy was killed. Conti led a contingent to recover the body of the count but was captured. When he was released several months later, Ferdinand II rewarded his bravery by giving him command of the garrison at Olomouc. He continued to defend the city against attacks from Gábor Bethlen. In 1622, Conti left Olomouc and took part in the Battle of Wimpfen. For his loyalty he was promoted to Colonel and Chamberlain.
Pontificate of Urban VIII
In 1623, Maffeo Barberini was elected to the papal throne as Pope Urban VIII and Conti went to Valtellina as a commander of papal troops. Valtellina saw significant conflict during the Thirty Years' War as each side of the Bourbon–Habsburg rivalry tried to gain control of the passes between Lombardy and Austria. For his service there, the pope rewarded Conti by naming him Duke of Guadagnolo and General of the Papal Army. Shortly after he was named Ordnance Master of the army of the Holy Roman Emperor. In 1626 he returned to Germany and commanded units loyal to Albrecht von Wallenstein during the Battle of Dessau Bridge. The following year, while von Wallenstein was elsewhere fighting Christian IV of Denmark, Conti commanded Imperial troops at Holstein.
Forced to retreat from the advancing Swedish army of King Gustavus Adolphus, Conti ordered his troops to burn houses, destroy villages and generally cause as much harm to property and people as possible, a military strategy known as scorched earth. His actions were remembered thus: And by another: When one village complained of the treatment they had received, Conti ordered them to be stripped naked so that they would "have sure grounds for complaints". Conti's actions have led some to suggest that Duke Bogislaw and his people were driven into the arms of the Swedes. They saw King Gustavus Adolphus as a far better alternative to the violent rampaging Torquato Conti and his Imperial troops. Faced with the choice, the Treaty of Stettin may have seemed less like a capitulation and more like a rescue to the people of Pomerania.
Retirement and later life
In September Conti's commanding officer, von Wallenstein, was dismissed by the Emperor whose advisers were concerned he was planning a coup to take control of the Holy Roman Empire. At the same time, Conti launched an exploratory attack on Stettin but was repulsed. Seeing that King Gustavus Adolphus had no interest in attacking his position, Conti sent a message to the monarch suggesting a truce for the length of the oncoming winter. Fired by the devastation Conti had caused, The King responded: "The Swedes can fight in winter as well as in summer". Suffering from illness and disheartened by the King's rebuke, Conti resigned his post in favour of Colonel Hannß Casimir von Schaumberg. Both Gartz and Greifenhagen, where Conti had been garrisoned, were soon thereafter lost to the Swedes. Conti travelled to Vienna where he received an honourable discharge and was appointed Gonfalonier of the Church by Pope Urban. He married Countess Felice Sassatelli-Bevilacqua in Ferrara but they had no children and Conti died there in 1636. Conti was the uncle of Michelangelo Conti who was elected to the papal throne as Pope Innocent XIII, though Michelangelo was born 19 years after Torquato Conti died.