Picasso Museum
The Picasso Museum in Barcelona is an obligatory stop during your stay. Opened in 1963, the museum reveals Picasso's deep relationship with Barcelona: an intimate, solid relationship that was shaped in his adolescence and youth, and continued until his death. 

Part of the permanent exposition is more than 3,800 pieces of Picasso's genius. The Museum wishes to be a dialogue space, exploring new approaches to Picasso's work and influence, and offering new perspectives on the Museum Collection.

The museum occupies five large town houses, which are an example of the Catalan civic gothic style. The hours of the museum are Tuesday to Sunday, from 10.00 - 18.00. The admission fee is EUR 10.00.

http://www.museupicasso.bcn.es/en/

Barcelona Contemporary Art Museum (MACBA)
The Barcelona Contemporary Art Museum houses works from the second half of the 20^th century, and along with its fascinating permanent collection, it also offers an amazing range of temporary modern exhibitions. 

The building, designed by Richard Meier, opened in 1995, and since then is the home of the largest number of contemporary works in Barcelona. The MACBA Collection, which begins with works from around 1950, consists of many works from Catalonian, Spanish and international artists.

Though not an anthology, it is a thorough overview of the fundamental aspects of contemporary art. You can visit the museum every day, except Tuesday, from 11.00 - 19.30. The museum is closed on Tuesdays. The fee is EUR 7.50. 

http://www.macba.cat

Chocolate Museum
For chocolate lovers, probably the most interesting place in Barcelona is the Chocolate Museum.  You will be taken on a journey through the history of chocolate, from the time when cacao was first brought to the European continent and its metamorphosis ever since. The "delicious" museum traces chocolate's various transformations and purposes -- as a medicine, an aphrodisiac, a nutritional food, and element somewhere between legend and reality.

You can also participate in various workshops for both children and adults, Workshops include: Chocolate's artists, where you can make chocolate figures, or Workshop of Infantile Confectionery, where you can learn the basics of confectionery and desserts.

The hours of the museum are from Monday to Saturday from 10.00 - 19.00. The admission fee is EUR 4.50.
http://www.pastisseria.com/en/PortadaMuseu

Catalan National Art Museum (MNAC)
The Catalan National Art Museum is housed in a magnificent palace overlooking the fountains of Montjuic. Catalan works of Romanesque, Gothic and Renaissance arts from 11th to 18th century are housed here. 

Be prepared to spend quite a long time; it would take you a few hours to go through the gallery rooms. The collections include works from different periods and schools, such as Romanesque Art, Gothic Art, Renaissance and Baroque Art, The Thyssen-Bornemisza Collection,The Cambó Bequest, and Modern Art.

The admission fee is EUR 8.50 and you can visit the museum every day from 10.00 - 19.00.
http://www.mnac.cat/index.jsp?lan=001

Catalan Museum of Archaeology
Exhibits at the Catalan Museum of Archaeology cover prehistoric times and ancient history. The curators have given particular emphasis to archaeological remains from Catalonia.

This museum is very interesting if you want to learn more about the ancient history of Catalonia, and is well worth a visit if only for the novelty of subject material. The museum, designed by Pelagi Martínez i Patricio, exhibits prehistoric artefacts and works of art from Ancient Greece and Rome.

The admission fee is EUR 3.00 and the hours of the museum are from Tuesday to Saturday , from 10.00 - 19.30, and Sunday from 10.00 - 14.30.
http://www.mac.cat/

Kirina Boykova / Expatica

Sources:

http://www.gaudiallgaudi.com

http://www.barcelona-tourist-guide.com

http://www.barcelona.com

http://www.mac.cat

http://www.macba.cat

http://www.bcn.cat/museupicasso

http://www.sagradafamilia.cat