Sagrada Família
The formation of the modern L2 first began in 1968, when construction commenced to extend the original line II from Sagrada Família station to Poble Sec station, with expected completion in 1971. However, poor planning resulted in significant difficulties in the tunnel's construction. In 1970, it was decided to redirect the original Line II westward and rename it L5, concurrently abandoning the construction of Line II's Gaudí station near the present-day Sagrada Família station. Construction of the tunnel from Sagrada Família station to Sant Antoni halted in 1973. The project was restarted in 1991, which included reconstructing and remodeling stations and tunnels. The reconstruction was completed in 1995, and the following year L2 was extended to Paral·lel station.