On Sunday afternoon all museums run by the city council have free entry from 3pm to 8pm. Usually there is a quite big line at this time, we strongly recommend you to get there in advance, ideally 1hour before the opening time.
Here the complete list of museums
Barcelona’s History Museum (MUHBA)
Plaça del Rei s / n Barcelona
Picasso Museum
Montcada 15-23 Barcelona
Barcelona Maritime Museum
Avda Drassanes s / n 08001 Barcelona.
The Vicereine - Centre of imatge
La Rambla 99 Barcelona.
Design Museum Hub Barcelona
Pl. de les Glòries Catalanes 37-38 08018 Barcelona
Music Museum
L’ Auditori c / Padilla 155 Barcelona
Natural Science’s Museum
Pg Picasso s / n Barcelona
Botanic Garden
Dr. Font i Quer 2 Montjuïc Barcelona Sunday open until 19pm
Frederic Marès Museum
Pl Sant Iu 5-6 Barcelona
Museum - Monastery of Pedralbes
Baixada the Monastery 9 Barcelona