 Today, Silesia remains predominantly Roman Catholic.Existing since the 12th century, Silesia's Jewish community was concentrated around Wrocław and Upper Silesia, and numbered 48,003 (1.1% of the population) in 1890, decreasing to 44,985 persons (0.9%) by 1910.In Polish East Upper Silesia, the number of Jews was around 90,000–100,000.