In the 19th century, the advancement in deep drilling and medical science provided the springboard for a further leap in bathing culture. Grand spas such as Gellért Baths, Lukács Baths, Margaret Island, and Széchenyi Medicinal Bath are a reflection of this resurgence in popularity. The Széchenyi Thermal Bath is the largest spa complex in Europe and it was the first thermal bath built in the Pest side of Budapest. This building is a noted example of modern Renaissance style. Located on the Buda side of Budapest, the Gellért spa is the most famous and luxurious thermal complex of the capital city.