: Statistical comparisons of how European cities have grown or shrunk over the last 60 years.

: The city is famous for its history in coal mining and heavy industry, which fueled its population growth through the mid-20th century.

While "131667" is not a standard five-digit U.S. ZIP code or a Canadian alphanumeric postal code , this specific number has unique historical significance. It represents a major population milestone for the Polish city of . The Significance of 131,667

At that time, the city was a thriving industrial hub in the Silesian region of Poland. This era marked a period of rapid urbanization and development for the city, which was part of the Katowice urban area. About Ruda Śląska