Despite having been under construction for more than 130 years, Gaudí's Sagrada Familia basilica in Barcelona has lacked the proper paper work. Turns out, the Unesco world heritage site, attracting more than 20 million visitors a year, has never been granted a building permit, the BBC News reports. 

After two years of negotiations, an agreement to remedy the situation was finally reached on Thursday. The church's trustees conceded to paying $41 million in fees over a 10-year period, so that the city can fund public transportation, increase accessibility, and make other improvements to the surrounding area. 

Ada Colau, Barcelona's far-left mayor, argued that the basilica's board has been working without a permit; has failed to pay proper taxes and fees on construction; and has not submitted the required paperwork for tearing down neighboring residential buildings. According to the Times, the church, on the other hand, contends they were granted a permit in 1885 by Sant Martí de Provençals. An independent town at the time, Barcelona officials assert the construction should have required new paperwork when Sant Martí was absorbed by the capital some years later. 

Work on the now famously unpermitted construction project is anticipated to finish in 2026, about 100 years after the eccentric architect's death. However, with continuous controversy over whether or not the famous landmark has remained reflective of Gaudí's intentions, debate is expected to continue.