The early Christian basilica has been documented since the 4th century, as the existence of bishops of Barcelona has been known since the mid-4th century.[4] In fact, the oldest existing document is from the year 343 and corresponds to the Council of Sardica, which records the attendance of the bishop of Barcelona, Pretextat.[5] In addition, from 599, at the second Tarraconensis Council of Barcelona, the chronicler Joan de Bíclar wrote the acts of the council, which states that the early Christian cathedral is under the invocation of the Sanctae Crucis.[1] Entering through the basement of the Museum of History of the City of Barcelona, you can visit the remains of the baptistery of the early Christian basilica (located under the rear choir of the current cathedral), with an octagonal pool.[1] The baptistery was excavated by archaeologist Frederic-Pau Verrié in 1965.[6]
The remains found of the classroom, which are basically the pavement and the foundations of the columns, led to the idea that they corresponded to the primitive cathedral, with three naves (the typical plan of