There are no formal plans for the building. It has evolved over time in response to opportunity and inspiration. One inspiration has been the Cupola of St Peter's Basilica in the Vatican City.
The outline of building is 20x50 metres. An area of about 8,000m 2 has been built. This includes a complex ensemble of cloisters, offices, lodgings and a library. The cathedral already has a dome (modelled on St Peters) rising to some 40 metres, some 12 metres in diameter — whose steel girders were raised with the aid of his six nephews using pulleys.  For almost 20 years, Gallego Martínez has had the support for his building project by a local called Angel Lopez Sanchez.
Most of the building materials and tools he uses for construction are recycled. He uses both everyday objects and excess construction materials donated by construction companies and a nearby brick factory. For instance, the columns have been moulded with old petrol drums.
It is estimated that it may take another 15 to 20 years to complete the building
The structure consists also of a convent, library, offices and living areas.