The billboard was put up on the Almirante Reis avenue - one of Lisbon's longest and busiest streets - and reads: "4,800+ children abused by the Catholic Church in Portugal."
The Vatican said about 330,000 young people have registered for an event in Portugal dubbed "the Catholic Woodstock."
The pope had decided to approve Shen "for the greater good" of the Shanghai diocese and because Shen was an "esteemed pastor."
The new cardinals will come from countries including the United States, Italy, the pope's native Argentina, Hong Kong, and several others.
A Vatican statement put an end speculation about what role Gaenswein, a powerful figure in the Vatican for more than a decade before Francis sidelined him after a personal falling out, would have.
Francis, 86, underwent a three-hour operation on Wednesday to repair an abdominal hernia
Pope Francis will have his operation under general anesthetic.
Francis did not take a position on the return of territories as a fundamental condition for peace, something on which Ukraine and many of its Western backers insist.
Francis has pleaded for peace practically on a weekly basis, and has repeatedly expressed a wish to act as a broker between Kyiv and Moscow. His offer has so far failed to produce any breakthrough.
Abuse scandals have shredded the Church's reputation and have been a major challenge for the pope.