by him of a belvedere for Schönbrunn Palace in Vienna. He also worked on a design for Starhemberg Palace (1702), also near Vienna. He was one of the first to use the Late Baroque style, in the manner of Francesco Borromini, in Austria, as architect of the church of Laxenburg, close to Vienna, although the level of his contribution here has been disputed. This church was the first building north of the Alps to contain swung façade elements characteristic of the High Baroque. It was built between 1693 and 1703 by Carlo Antonio Carlone and continued between 1703 and 1724 by Steinl. The rich Baroque façade of the Carmelite church in Sankt Pölten, Austria, was built by the famous Baroque architect Jakob Prandtauer (c. 1708), but Steinl seems to have been involved in the design. His tower façade of the Dorotheakirche (1702–1704) in Vienna no longer exists. His architectonic designs were mostly realised by Josef Munggenast (1680–1741), nephew of Jakob Prandtauer. Around this period Steinl seems largely to have ceased his direct participation in his sculpture workshop, but he still produced the occasional piece, as attested by the statues for the crypt altar of the Capuchin church in Vienna (c. 1715). He also continued to work as imperial ivory engraver until at least 1712, producing two further major works : the equestrian statuette of Emperor Charles VI (now in the Schatzkammer (Vienna) and the portrait relief of the Bishop of Breslau Franz Ludwig von Pfalz-Neuburg (now at the Bavarian National Museum, Munich). After being appointed imperial engineer for buildings and gardens (Kaiserlicher Bau-und-Hof-Ingenieur) he applied himself to the design of interior decorations for monasteries and churches, including the following: Vorau Abbey: the high altar (created by the sculptors J. F. Caspar and G. Niedermayr) and the entire interior (1699–1704); pulpit (1706) (this work is considered as the first High Baroque decoration in Austria with a stylistic and iconographic unity); Klosterneuburg Priory: a monstrance (1710); the triumphal arches, choir decorations (together with Donato Felice d'Allio) and an altar (1714); the Baroque refurbishment of the main hall (1725–27) Herzogenburg Priory: a monstrance (1722). Steinl also made the designs for the reconstruction of the church here c. 1700; Zwettl Abbey: choir decorations. Among Steinl's later creations as architect were the tower of the Augustine church at Dürnstein (1721–1725) and the tower of the monastery church of Zwettl Abbey (1722–1728). These were constructed in