The new reserve spaces are distributed between the Seminari, the future MDT building on Sant Pau street, and five rooms in the Casa dels Concilis. These locations house varied collections, including sculpture, painting, tapestries, choir books, gold and silver work, and a lapidary featuring archaeological and epigraphic elements.

The comprehensive project for these reserves, which includes construction, furniture, and preventive conservation tasks, cost approximately 400,000 euros. The Archbishopric of Tarragona covered 55% of the funding, while the remaining 45% was subsidized by the Department of Culture of the Generalitat de Catalunya.

This action is the most significant achievement of the MDT's 2021-2025 Strategic Plan, which also involved renewing security systems, creating Sala I about the origins of the Church of Tarragona, and musealizing the gardens of Santa Tecla la Vella.

The major goal for the MDT is set for 2031, marking the 700th anniversary of the consecration of the Tarragona Cathedral by Archbishop Joan d’Aragó. By this date, the new Diocesan Museum is intended to be a reality, with a projected investment of five million euros.

The project, framed under the title 'The Acropolis of Tarragona and the Roots of Europe', seeks to transform the city into an international cultural and tourist reference point. The Archbishopric emphasized the need for unified efforts among administrations and securing support from private patronage to achieve this ambitious objective.