Wawel's Director Andrzej Betlej announced the figures at a news conference on Thursday.
He said the historic castle drew 2,561,000 people this year, "an absolute record," adding it would "hopefully be bettered" in the future.
The Royal Wawel Castle hosted 10 exhibitions in 2023, including its biggest-ever show, about Poland's Jagiellonian dynasty, featuring "over 400 artefacts from all over the world," the state news agency PAP reported.
The castle's art collection expanded with the acquisitions of paitings by the likes of Titian, Jan Brueghel the Younger and Paris Bordone, and rare Meissen porcelain sculptures, according to officials.
In 2023, the Royal Wawel Castle also hosted concerts, published 27 books and catalogues and won 17 awards, the PAP news agency reported.
For 2024, officials have planned 16 exhibitions, such as Wawel Underground: The Lapidarium, giving audiences the chance to visit the royal palace's cellars for the first time.
The show will feature, a "hitherto unexhibited collection of early modern architectural details and stone sculptures," discovered during archeological excavations and "preserved from the 19th century to the present day," reporters were told.
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Source: PAP, The Royal Wawel Castle