Johann Bernhard Fischer von Erlach was an Austrian architect, sculptor, engraver, and architectural historian whose Baroque architecture profoundly influenced and shaped the tastes of the Habsburg Empire. His influential book A Plan of Civil and Historical Architecture (1721) was one of the first and most popular comparative studies of world architecture. His major works include Schönbrunn Palace, Karlskirche, and the Austrian National Library in Vienna, and Schloss Klessheim, Holy Trinity Church, and the Kollegienkirche in Salzburg.

Baroque architecture is a highly decorative and theatrical style which appeared in Italy in the early 17th century and gradually spread across Europe. It was originally introduced by the Catholic Church, particularly by the Jesuits, as a means to combat the Reformation and the Protestant church with a new architecture that inspired surprise and awe. It reached its peak in the High Baroque (1625–1675), when it was used in churches and palaces in Italy, Spain, Portugal, France, Bavaria and Austria. In the Late Baroque period (1675–1750), it reached as far as Russia, the Ottoman Empire and the Spanish and Portuguese colonies in Latin America. In about 1730, an even more elaborately decorative variant called Rococo appeared and flourished in Central Europe.