[3] The publishing house kept working intensely even during the First World War, mainly on the publication of magazines for the troops on the front such as La Tradotta, which included contributions from famous illustrators and writers such as Soffici, De Chirico and Carrà.

[citation needed] Despite a period of cultural autarky, in 1933 Mondadori started publishing works of international writers with the Medusa book series.

In 1950 Mondadori returned to the information magazines, abandoned ten years earlier with the suspension, due to the war, of the monthly Tempo.

The first novel published was A Farewell to Arms by Ernest Hemingway, who immediately experienced great results in terms of copies sold.

Between 1950 and 1965, the number of employees at Mondadori rose from 335 to 3,000 and resulted in the company's decision to construct a new building in the outskirts of Milan, specifically within the municipality of Segrate.

In 1968, Giorgio Mondadori, Arnoldo's son and chairman of the publishing house, decided to assign the project for the new headquarters to Brazilian architect Oscar Niemeyer, after having admired his work on the Foreign Ministry (Palácio Itamaraty) in Brasilia three years earlier.

In 1981 Mondadori entered the television business with the launch of the Rete Quattro TV station, which was sold to Fininvest a few years later.

In the same year, through a joint venture with Canada's Harlequin Enterprises, the romantic fiction book series Harmony began to be published in Italy.

In 2010 Mondadori accelerated its presence: in June, the Group's online bookstore launched a store dedicated to digital books, with a vast catalogue of titles in Italian and English.

The digital development continued in July 2011 with an agreement between Mondadori and Amazon that makes the Group's e-books available through the Kindle store.

[16] In 2014 Mondadori bought the trademark and assets of aNobii, the global social reading platform with more than a million users around the world, of which around 300,000 in Italy, with the aim of supporting the process of growth in digital for books.

In 2016, the Italian Competition Authority ruled that Mondadori would have to divest the publishers Bompiani and Marsilio Editori, following its acquisition of RCS Libri.

[23] As part of the strategy of focusing on its core businesses, in 2018 the Group sold Panorama[24] and in 2019 its subsidiary Mondadori France to Reworld Media.

The ruling was made public on 24 January 1991 and nullified the arbitrary award verdict and gave the Mondadori shares back to Berlusconi's Fininvest.

Its authors included Cesare Pavese, Elio Vittorini, Italo Calvino, Leone Ginzburg and Bruno Zevi, and it was the publisher of Antonio Gramsci’s Prison Notebooks.

Its traditional international focus, and concentration on current affairs, has been supplemented in recent years by publications in fiction, non-fiction, economics, manuals and popular science.