Joined the Mercedarians in Barcelona, Spain. Prior of his house. General procurator of the Mercedarians in 1439. Attended the Council of Basel in 1439–1440. He several times visited the Vatican for consultation with the pope. Travelled to Tunis in North Africa in 1447 to ransom Christians enslaved by Muslims; he survived, but the treasure he carried was lost, and he was unable to free the slaves.
- 24 October 1466 in Barcelona, Spain of natural causes
- buried near the main altar of the church of the Mercedarian convent in Barcelona
- “Blessesd Juan de Segalars“. CatholicSaints.Info. 7 May 2016. Web. 23 January 2017. <>