This document provides an introduction to a study examining how cities use urban planning to enhance innovation activity. It discusses two main approaches in the literature - the "innovative milieu" focusing on networks, and the "creative city" emphasizing human encounters. The study analyzes over 20 cases across 9 cities, exploring how urban strategies and specific developments address innovation infrastructure. It aims to understand how planning is used to promote innovation, knowledge creation and creativity. Theories on linking these areas are discussed in Chapter 2, while Chapter 3 assesses innovation references in city strategies. Subsequent chapters present case studies of innovation districts, parks and environments, concluding with proposals for future cooperation.