The Museu Diocesà i Comarcal de Solsona is housed in part of the premises of the Episcopal Palace and the area above the Cathedral cloister. The Episcopal Palace is the work of Solsona-born architect Francesc Pons and was built between 1776 and 1792 under the impetus of the enlightened Bishop Rafael Lasala. It is a neoclassical work with a façade that opens on to the Palace square embellished with elements of Greco-Roman inspiration, attributes of Bishop Lasala and motifs symbolising the Episcopal ministry and the mission of the Church. An atrium and a large indoor staircase crowned by a dome decorated with mural paintings allow access to the various rooms of the Palace, used today as offices of the Diocesan Curia, the living quarters of the Bishop, the Diocesan Archive and the Museu Diocesà i Comarcal.

During the refurbishment of the Museum, the entire Episcopal Palace was restored and adapted to the current needs of the Roman Catholic Diocese of Solsona. In 2010, the façades of the entire Palace were restored, returning the building to its sober neoclassical beauty.