The commemoration of the twentieth anniversary of the foundation of ACXT is a magnificent opportunity to enjoy the quality and quantity of the work accomplished over these years. In this volume, many and varied projects are gathered from different sectors and of different sizes and types. All were carried out starting with a shared commitment to quality and with the intention of offering true service to those who trust in us. Different projects, each with the personality of its authors, but united by a shared attitude of professionalism and thoroughness. The high number of projects does not affect the enthusiasm we put into each one of them, regardless of its size or media impact.