From 1865 to 1875, Vilmos Zsigmondi drilled a hole beneath the park that was 975.36 meters deep (3,200 feet). This would later become the source of thermal water that would supply the spa. During the planning phase from the 1880s, the bath had originally been referred to as the Artesian spa (
Artézi fürdő), but when it opened on 16 June 1913 it was officially named Széchenyi spa (
Széchenyi gyógyfürdő) after
István Széchenyi. The bath, located in the
City Park, was built in
Neo-Baroque style to the design of
Győző Czigler. Construction began on 7 May 1909 with designs by architect Eugene Schmitterer. The pool construction cost approximately 3.9 million
Austro-Hungarian korona. The total area covered was . More than 200,000 bathers visited the spa in 1913. This number increased to 890,507 by 1919. At that time the Bath consisted of private baths, separate steam-bath sections for men and women, and male and female "public baths". The complex was expanded in 1927 to its current size, with 3 outdoor and 15 indoor pools. It is now possible for both sexes to visit the main swimming and thermal sections. After the expansion, the thermal artesian well could not supply the larger volume of water needed, so a new well was drilled. The second thermal spring was found in 1938 at a depth of , with a temperature of . It supplies of hot water daily. Between 1999 and 2009 the Széchenyi thermal bath was refurbished in a complete renovation. ==Units==