In Cyprus, Pope Francis has a message for all of Europe: We need dialogue and open doors—not walls.

Within hours of arriving in Nicosia, the capital of Cyprus, Pope Francis addressed head-on the main cause of people’s suffering on this beautiful island: the division of the country following the invasion by Turkey in 1974. He also referred to the grave problems caused by the pandemic and the difficulties resulting from migration.

He did so at the presidential palace in Nicosia in his keynote address to the political authorities and the diplomatic corps, after paying homage to the...