Roman Catholic Diocese of Wiener Neustadt

The former Roman Catholic Diocese of Wiener Neustadt in Lower Austria existed from 1469 to 1785.

Upon the request of the Emperor Frederick III, the diocese was created by Pope Paul II on 14 January 1469, and was immediately subject to the Holy See.

In 1769 the new parish of Theresienfeld was added and in 1784 its territory was extended from Wiener-Neustadt to the boundary of Styria.

(1775–1785), and his cathedral chapter were transferred to the newly erected Diocese of Sankt Pölten.

In the late 15th century 12 statues of the Apostles were added in the apse, while the bust of Cardinal Melchior Klesl is attributed to Gian Lorenzo Bernini.