After the Spanish Civil War the construction of La Sagrada Família began again and the church continued to rise slowly. From 1939 to 1940, the architect Francesc de Paula Quintana i Vidal, an associate of Gaudí since 1919, restored the burnt crypt and reconstructed many of the damaged models, which were used to continue the construction according to Gaudí's original idea.
In 1952 the XXXV International Eucharistic Congress was held in Barcelona, and a number of events were organised in the church on that occasion. The same year the Nativity staircase was built and the façade illuminated for the first time; from 1964 it became permanent at the decision of Barcelona Council.
The works continued strongly in 1954, when the foundations of the Passion façade were begun, based on the many studies done by Gaudí between 1892 and 1917. After the foundations came the crypt, where in 1961 a museum was opened to explain to visitors the historical, technical, artistic and symbolic aspects of the church. On that façade the four terminations of the bell towers were erected in 1976; they were finished the following year.
One important date is 1955, when the first "collection" was made, a whole day devoted to collecting funds to pay for the works, an initiative that was maintained in the following years as a way for society to take part in the construction of the church.
On 19 March 1958, the feast of St Joseph, the sculptural group representing the Holy Family, done by Jaume Busquets, was placed on the Nativity façade.
From 1978 the foundations of the nave and the crossing were done and the columns, vaults and façades of the main nave and the transepts were erected.