How was the Baroque Era affected by the Thirty Years' War?
Baroque style was encouraged by the Catholic Church and the Counter-Reformation which was deeply involved in the Thirty years War.
The Baroque Style began in Italy around 1600 and was encouraged by the Catholic Church and Catholic nobility as an inspirational and monumental new style to promote Catholicism. Protestant iconoclasm led to both the destruction of Religious art and lessen of amount of art in Protestant areas. Europe was divided into the Protestant North and Catholic South.
The Thirty Years War turned into a power conflict between Empires when France entered it on the Protestant side. The solidifying of Protestant and Catholic areas created a divide in Artistic Styles.
Later in the Baroque era the Style turned into a secular style for Civic Buildings and was much reviled in the later periods.