Inside the Cathedral Church, at it;s feet, you'll find a staircase lined with gorgeous embedded tile from the seventeenth century, accessing the cathedral museum. Up the first flight of stairs is a landing from which you can view the interior of the Cathedral from up above. The museum consists of several rooms, where sacred art objects, figurines, carvings, paintings, clothing and liturgical objects are on display.
The Convent of Our Lady of the Assumption is in the Old Town, just behind the Cathedral, and has hosted since 1973 the "Archaeological Museum and Lapidar Infante D. Henrique". Opposite the building is a square with a statue dedicated to Alfonso III. It was built in the early sixteenth century as a convent of the Poor Clares Mothers. It's listed as a National Monument and is in Renaissance style, with Baroque dome and Manueline church. The convent chapel is now used as an auditorium. Museum hours are: October-May: Tuesday-Friday: 9.30-12.30 and 14.30-17.30. Saturday and Sunday: 10-12 and 14-16. June-September: Tuesday-Sunday: 9.30-12.30 and 16-19. Closed Mondays and holidays. Admission is 4 € and you're not allowed to take pictures inside. It contains archaeological objects from prehistory to the Middle Ages, emphasizing the Roman era, whose pieces include a mosaic ocean and busts of emperors Agrippinus, Adriano and Galiano. It also contains a complete collection of sacred art and religious paintings. Previously, the museum was installed in the Capuchin Convent.
The Municipal Museum Dr. Joseph Formosinho is attached to the Church of San Antonio (National Monument). It was founded by José dos Santos Pimenta Formosinho in 1932. It's a very interesting museum, the exhibition is divided into different sections: Archaeology, Sacred Art, History of Lagos, Algarve Ethnography, Painting, Numismatics, Overseas Ethnography and Mineralogy. It can be visited Tuesday-Sunday 9.30-12.30 and 14-17. Admission is joint for the church and museum and costs 2.60 € per person.
The Algarve Regional Museum is in the downtown area, where the pedestrian and shopping streets are. It's an ethnographic museum, in which objects, pictures, clothes and utensils of daily life are displayed showing the lifestyle of this Portuguese region. Open Monday-Friday 9-12.30 and 134-17.30.
Interpretation Center of the Territory, in a building in the [poi = 310661] Revellín Hill [/ poi], also houses a coffee bar. Built using local materials such as adobe natural earth pressed or handmade bricks. Tries to be a visitor reception center and starting point for visitors. In the center a model of the city, and on the walls a series of panels about the environment. In addition, large windows that act as lookout to 360 º around the surrounding territory, part of the [poi = 310631] nature reserve Sapal. [/ Poi] Hours: Tuesday to Sunday from 10 to 17h. Free admission.
The Maritime Engagement House is located in the Plaza de la Restauranción, just in front of the Church of Our Lady of the Remedies. It is a two-story 70's building, in which the dome stands out, and in front there is a niche with a statue of the Virgin de los Remedios. The Fishermen's Mutual was founded in the eighteenth century, and since 1943 has housed the Museum of the City, where you can visit the archaeological collection and ethnographic collection, some temporary exhibitions, and a library.
The Algarve Living Science Center is a place to spark interest in science for the young and old, through various recreational activities. It's near the port and it's hours are: Winter 01/09 to 14/07 Wednesday to Friday 10:00-17:00. Saturdays, Sundays and holidays 11: 00-18:00. Summer 15/07 to 31/08 Wednesday to Sunday and holidays from 15:30-23:30.
Portimao Museum is in the old Feu cannery, founded in the early nineteenth century on the banks of the River Arade, near the naval club. It's a huge building (5,000 m2), that's completely renovated and dedicated to the historical, ethnographic and industrial city. One of the most striking collections is the underwater archeology. The building also has a temporary exhibition hall, auditorium and documentation center/city history archive. Entrance is 3 €.
Opened in 2007 on the premises of Castro Marim Castle, this small museum displays finds from archaeological excavations on the hill where the castle stands. It's a historical and archeological museum that displays pottery, coins, tombstones, etc. from different historical periods (Bronze Age, Iron, Roman) and evidence of early human occupation in Castro Marim. Hours: 10-12 and 15-18. Admission is free, but first you have to pay € 2 to enter the grounds of the Castle.