To understand why these towers exist, we must look back to the 1929 Barcelona International Exposition. This world’s fair was a massive event designed to showcase Spain's technological and architectural progress to the world. The architect behind these specific structures was Ramon Reventós, a man who left a deep mark on this area, having also worked on the nearby Spanish Village and the Greek Theatre. Built between 1927 and 1929, the towers were not actually intended to be permanent. Just like the famous Eiffel Tower in Paris, they were meant to be temporary symbols for the fair, which explains why they were built using relatively simple materials like artificial stone, red brick, and wood. However, they became such a beloved part of the city's skyline that Barcelona simply could not bring itself to tear them down after the exhibition ended.