One of Barcelona's most fascinating museums takes you back through the centuries to the very foundations of Roman Barcino. You'll stroll over ruins of the old streets, sewers, laundries and wine- and fish-making factories that flourished here following the town's founding by Emperor Augustus around 10 BC. Equally impressive is the building itself, which was once part of the Palau Reial Major (Grand Royal Palace) on Plaça del Rei, among the key locations of medieval princely power in Barcelona.
The square is frequently the scene of organised or impromptu concerts and is one of the most atmospheric corners of the medieval city.
Enter through Casa Padellàs, just south of Plaça del Rei. Casa Padellàs was built for a 16th-century noble family in Carrer dels Mercaders and moved here, stone by stone, in the 1930s. It has a courtyard typical of Barcelona’s late-Gothic and baroque mansions, with a graceful external staircase up to the 1st floor. Today it leads to a restored Roman tower and a section of Roman wall (whose exterior faces Plaça Ramon de Berenguer el Gran), as well as a section of the house set aside for temporary exhibitions.
Below ground is a remarkable walk through about 4 sq km of excavated Roman and Visigothic Barcelona. After the display on the typical Roman domus (villa), you reach a public laundry (outside in the street were containers for people to urinate into, as the urine was used as disinfectant). You pass more laundries and dyeing shops, a 6th-century public cold-water bath and more dye shops. As you hit the Cardo Minor (a main street), you turn right then left and reach various shops dedicated to the making of garum. This paste, a popular food across the Roman Empire, was made of mashed-up fish intestines, eggs and blood. Occasionally prawns, cockles and herbs were added to create other flavours. Further on are fish-preserve stores. Fish were sliced up (and all innards removed for making garum), laid in alternate layers using salt for preservation, and sat in troughs for about three weeks before being ready for sale and export.
Next come remnants of a 6th- to 7th-century church and episcopal buildings, followed by winemaking stores, with ducts for allowing the must to flow off, and ceramic, round-bottomed dolia for storing and ageing wine. Ramparts then wind around and upward, past remains of the gated patio of a Roman house, the medieval Palau Episcopal (Bishops’ Palace) and into two broad vaulted halls with displays on medieval Barcelona.
You eventually emerge at a hall and ticket office set up on the north side of Plaça del Rei. To your right is the Saló del Tinell, the banqueting hall of the royal palace and a fine example of Catalan Gothic (built 1359–70). Its broad arches and bare walls give a sense of solemnity that would have made an appropriate setting for Fernando and Isabel to hear Columbus’ first reports of the New World. The hall is sometimes used for temporary exhibitions, which may cost extra and mean that your peaceful contemplation of its architectural majesty is somewhat obstructed.
As you leave the saló you come to the 14th-century Capella Reial de Santa Àgata, the palace chapel. Outside, a spindly bell tower rises from the northeast side of Plaça del Rei. Inside, all is bare except for the 15th-century altarpiece and the magnificent techumbre (decorated timber ceiling). The altarpiece is considered to be one of Jaume Huguet’s finest surviving works.
Head down the fan-shaped stairs into Plaça del Rei and look up to observe the Mirador del Rei Martí (lookout tower of King Martin), built in 1555, long after the king’s death. It is part of the Arxiu de la Corona d’Aragón; the magnificent views over the old city are now enjoyed only by a privileged few.