Bielefeld in the recent past has been the focal point of a widespread satire of a conspiracy theory, which mentions that the city exists - but only as an illusion and a figment of imagination! The theory itself has been a huge factor for people with a kick for thrills to visit here. In fact, Bielefeld's history dates back to 1214 A.D. during the rule of Count Ludwig von Ravensberg, who erected the stunning Sparrenburg Castle which now serves as the city's most significant landmark. The city is not short of beautiful historic monuments, lively art scene, exciting entertainment venues and an energetic cultural setting.