Detailed Explanation:

Technopolis is a city or region specifically designed and developed to support high-tech industries, research institutions, and innovation ecosystems.

Silicon Valley (California, USA) is the world's most famous technopolis, housing major IT companies (Google, Apple, Facebook), venture capital firms, and Stanford University. London, Paris, and Moscow are traditional capital cities with diverse economies but lack the focused high-tech infrastructure characteristic of a technopolis.