This document provides information about Greece, the region of Macedonia, and the city of Katerini. It discusses that Greece is located in southern Europe, borders several countries, and was the birthplace of democracy and the Olympics. It then describes Macedonia as the largest region in Greece, bordering several countries, and notes its main rivers and cities. Finally, it focuses on Katerini as the capital of Pieria regional unit, providing details about its location, population, and landmarks like the municipal square.