In 1670, Vienna was a thriving city and the capital of the Holy Roman Empire. During this year, several significant events took place:

Construction of the Karlskirche: Construction of the Karlskirche, one of the most famous Baroque churches in Vienna, began in 1670. The church was built in honor of Saint Charles Borromeo, a Catholic saint who was known for his charitable works.

Expansion of the city walls: Vienna's city walls were expanded in 1670 to accommodate the growing population and to provide better defense against potential invaders.

The Ottoman Empire: The Ottoman Empire was a significant threat to Vienna during this time, and tensions between the Ottoman Empire and the Holy Roman Empire continued to rise. In 1670, Ottoman forces launched a failed siege of Vienna, which was a significant victory for the Holy Roman Empire and a turning point in the conflict.

The arts: Vienna was a center of culture and the arts during this time, and many famous artists and musicians lived and worked in the city. In 1670, the famous composer Johann Pachelbel was appointed as the organist at the St. Stephen's Cathedral in Vienna, where he composed several famous works.

Overall, 1670 was a significant year in the history of Vienna, marked by expansion, cultural achievements, and ongoing conflict with the Ottoman Empire.