St. Martin's Cathedral in Eisenstadt was first mentioned 1264. From this chapel there are still remains of a Romanesque foundation in the area of the present choir. In the 13th century the chapel was extended by the addition of an early Gothic choir. In the 14th century a chapel for lay people was added. In 1460 the church was rebuilt under the town captain Johann Siebenhirter as a fortified or defensive church, as an attack by the Turks was expected after the Fall of Constantinople in 1453. The Gothic building was finished in 1522. After the great fire of 1589 almost 30 years passed before construction of the severely damaged church took place, between 1610 and 1629.
In 1777 a large altarpiece by Stefan Dorffmeister was added, depicting 'The Transfiguration of St. Martin'. In the following year the Viennese organ builder Malleck installed an organ to instructions from Joseph Haydn.
After the creation of the Diocese of Eisenstadt, St. Martin's Church was elevated to the rank of cathedral in 1960. Saint Martin became the patron saint of the diocese and the Land. Under Bishop Stephan László in 1960 the interior and windows were renewed.
The cathedral is famous for its church music. Concerts of the annual Haydn Festival also take place here.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.