The Invisible 5G project aims to address the challenges of 5G network densification, particularly those arising from the existence of specific requirements in consolidated urban centres that create particular needs in the design and implementation of antennas. To this extent, the project proposes the development of a small, low-power, hidden (or practically invisible) 5G base station that can be discretely and harmoniously integrated into the existing urban furniture. The LiDA collaboration consists of the design and development of a system of customizable enclosures for 5G antennas, allowing the creation of small series adapted to particular urban contexts, such as historic centres, town squares, or other urban areas where the visual integration of the antenna is considered particularly relevant.