This document outlines a plan to develop a network of medieval castles and walls along the Mondego River in central Portugal. The plan's key points are: 1) Creating a network called RUCI to connect 8 municipalities and their historic sites; 2) Developing cultural tourism by promoting the region's historic heritage; 3) Implementing projects to fund preservation, create jobs, and boost local economies. The overall goal is to increase economic competitiveness and innovation through valorization of the region's defensive heritage.