Pious IX (Giovanni Maria Mastai Ferretti) was born in Senigallia on 13th May 1792. He became pope in 1846.
He proclaimed the dogma of the Immaculate Conception and convened the First Vatican Council in 1869. In 1848 he granted the Constitution and allowed his army to participate at the earliest stages of the War of Independence against Austria.
After the constitution of the Roman Republic in 1848, he was sent into exile in Gaeta, but returned to Rome in 1850 where he gave rise to an intense rebirth of the Church. He died on February 7, 1878. He’s been declared Blessed in the Jubilee Year 2000. In Senigallia you can visit the museum named after him and the Diocesan Library' Mastai Ferretti 'with a section of more than a thousand volumes dedicated to him and published from 1800 onwards.