Geneva Around this time, the House of Savoy came to at least nominally dominate the city. In the 15th century, an oligarchic republican government emerged with the creation of the Grand Council. In the first half of the 16th century, the Protestant Reformation reached the city, causing religious strife, during which Savoy rule was thrown off and Geneva allied itself with the Swiss Confederacy. In 1541, with Protestantism on the rise, John Calvin, the founder of Calvinism, became the spiritual leader of the city and established the Republic of Geneva. By the 18th century, Geneva had come under the influence of
Geneva Lake with the nearby town of Geneva, Illinois, the city was renamed "Lake Geneva"; later the lake was renamed "Geneva Lake". Lakeshore attractions include Big Foot Beach State Park, Lake Geneva Yacht Club, the George Williams College campus of Aurora University, and Yerkes Observatory. The observatory is owned by the University of Chicago, which has established a study group to plan a regional center for science education at the observatory. Public access to the lake is allowed as the result of a decision by early European settlers that "20 feet of land leading up to the shoreline should be public domain."