A Pole on the balcony next to the Pope. Who is Fr. Krzysztof Marcjanowicz?

On Thursday, May 8 after 19 Eyes around the world were turned in one direction. Everyone waited for the balcony of the Basilica of St. Piotr will appear Cardinal Protodiakon and says “Habemus Papam”.
Finally, Dominique Mamberti announced that a new pope had been chosen. This is the American Robert Prevost, who took the name Leon XIV. He is the first Pope Augustian and the second priest from America on the Peter Throne. At this historical moment, a Pole also had his important role.
The Pole was on the balcony just before the new pope. This is Fr. Krzysztof Marcjanowicz
Father Krzysztof Marcjanowicz and the Cardinal Protodiakon went out on the balcony of the Vatican Basilica. The Pole was holding a book from which Dominique Mamberti read the name of the pope chosen by the conclave. It was a key moment of announcement of the successor of the deceased Pope Francis.
It was Francis in 2023 who appointed the Polish clergyman of the Dycaster Dykasteria Undersecretary for Divine Worship and the Sacrament's discipline. Father Krzysztof Marcjanowicz was born in Krakow in 1977. He also lectured there at the Papal University of John Paul II. He was ordained a priest in 2002 in the Wawel Cathedral.
He worked in a parish in Łapanów near Krakow, and two years later he was sent to study in Rome. In 2010, he obtained a doctorate at the Papal Liturgical Institute. From 2011, he worked at the Papal Council for Promotion of New Evangelization. In 2018 he became a papal ceremony.