In the spring of 323 he moved down to Babylon, receiving on the way embassies from lands as far as the confines of the known world, for the eyes of all nations were now turned with fear or wonder to the figure which had appeared with so superhuman an effect upon the world's stage.
From this time he remained constantly attached to the person of the sultan, and was employed on various embassies and in departments of the civil government.
Attaching himself afterwards to Cardinal de Tournon, he accompanied him in 1554 to Italy, whence he was several times sent on embassies to the king, with reports on the siege of Siena.
Both sides sent embassies to the emperor at Constantinople, as both saw the importance of gaining the recognition and support of the East, for on this practically depended the victory in the struggle between papacy and council for the supreme jurisdiction over the church (see CouNcILs).
Every nine years a great festival was held there to which embassies were sent by all the peoples of Sweden.
It would be tedious to follow him through all his embassies to petty courts of Italy, the first of which took place in 1499, when he was sent to negotiate the continuance of a loan to Catherine Sforza, countess of Forli and Imola.
These embassies were the school in which Machiavelli formed his political opinions, and gathered views regarding the state of Europe and the relative strength of nations.
In the matter of the divorce of of his unrelenting opponent slowly wore down his Catherine of Aragon, and was sent by the king on embassies to the pressure strength.
After his return the king seems to have regarded him with greater favour, created him duke of Aquitaine, and employed him in repeated embassies to France, which at length resulted in a treaty of peace, and Richard's marriage to the French king's daughter.
Both these embassies were undertaken contrary to the wishes of King Casimir IV., who was altogether opposed to Olesnicki's ecclesiastical policy.