The Progressive Era brought an Efficiency Movement typified in 1902 when the city and Denver County were made coextensive . In 1904 Robert W. Speer was elected mayor and initiated several projects that added new landmarks , updated existing facilities , or improved the city 's landscape including the City Auditorium , the Civic Center and the Denver Museum of Nature and Science . City leaders went to Washington D.C. and after assuring the politicians there that Denver was no longer a frontier town , secured the first major party convention in a western state , the 1908 Democratic National Convention
1908 Democratic National Convention
1908 Democratic National Convention
History of Denver