Question: Why did Roncalli leave the city where the creator of La Schiavona died?

Knowledge 1: La Schiavona
Portrait of a Lady, also known as La Schiavona (the woman from Dalmatia), is a 1510–12 portrait by Titian of an unknown woman. [SEP] Knowledge 2: Pope John XXIII
Following the death of Pope Pius XII on 9 October 1958, Roncalli watched the live funeral on his last full day in Venice on 11 October. His journal was specifically concerned with the funeral and the abused state of the late pontiff's corpse. Roncalli left Venice for the conclave in Rome well aware that he was papabile,[b] and after eleven ballots, was elected to succeed the late Pius XII, so it came as no surprise to him, though he had arrived at the Vatican with a return train ticket to Venice.[citation needed] [SEP] Knowledge 3: The Martyrdom of Saint Lawrence (Titian)
The Martyrdom of Saint Lawrence is a 1558 painting by Titian, now in the church of I Gesuiti in Venice. It so impressed Philip II of Spain that he commissioned a second version in 1567 for the basilica at El Escorial.
Knowledge 1: The Martyrdom of Saint Lawrence (Titian)
The Martyrdom of Saint Lawrence is a 1558 painting by Titian, now in the church of I Gesuiti in Venice. It so impressed Philip II of Spain that he commissioned a second version in 1567 for the basilica at El Escorial. [SEP] Knowledge 2: Pope John XXIII
Following the death of Pope Pius XII on 9 October 1958, Roncalli watched the live funeral on his last full day in Venice on 11 October. His journal was specifically concerned with the funeral and the abused state of the late pontiff's corpse. Roncalli left Venice for the conclave in Rome well aware that he was papabile,[b] and after eleven ballots, was elected to succeed the late Pius XII, so it came as no surprise to him, though he had arrived at the Vatican with a return train ticket to Venice.[citation needed] [SEP] Knowledge 3: La Schiavona
Portrait of a Lady, also known as La Schiavona (the woman from Dalmatia), is a 1510–12 portrait by Titian of an unknown woman.
Knowledge 1: La Schiavona
Portrait of a Lady, also known as La Schiavona (the woman from Dalmatia), is a 1510–12 portrait by Titian of an unknown woman. [SEP] Knowledge 2: Pope John XXIII
Following the death of Pope Pius XII on 9 October 1958, Roncalli watched the live funeral on his last full day in Venice on 11 October. His journal was specifically concerned with the funeral and the abused state of the late pontiff's corpse. Roncalli left Venice for the conclave in Rome well aware that he was papabile,[b] and after eleven ballots, was elected to succeed the late Pius XII, so it came as no surprise to him, though he had arrived at the Vatican with a return train ticket to Venice.[citation needed] [SEP] Knowledge 3: Pope John XXIII
In February 1939, he received news from his sisters that his mother was dying. On 10 February 1939, Pope Pius XI died. Roncalli was unable to see his mother for the end as the death of a pontiff meant that he would have to stay at his post until the election of a new pontiff. Unfortunately, she died on 20 February 1939, during the nine days of mourning for the late Pius XI. He was sent a letter by Cardinal Eugenio Pacelli, and Roncalli later recalled that it was probably the last letter Pacelli sent until his election as Pope Pius XII on 2 March 1939. Roncalli expressed happiness that Pacelli was elected, and, on radio, listened to the coronation of the new pontiff.

Answer: for the conclave in Rome