The Cathedral of Our Lady of Strasbourg, also known as Strasbourg Cathedral, is a stunning example of Gothic architecture located in Strasbourg, France. Construction began in 1015, and it was completed in 1439. The cathedral is renowned for its intricate façade, beautiful stained glass windows, and a remarkable astronomical clock. Standing at 142 meters, it was the tallest building in the world until the completion of the Eiffel Tower in 1889. The cathedral is a UNESCO World Heritage site and attracts millions of visitors each year, who come to admire its architectural beauty and historical significance.