A fundamental question of this AD is why the phenomena that multispace describes are of concern to architects. The answer is that multispace points to a situation that is at root an architectural one. Offering both a collective and highly personalised experience, static and dynamically customisable, and above all at the same time public and private, multispace lies at the centre of a set of tensions, concerns and preoccupations at the core of our conception of architecture as theory and practice. It is the messy space between, with rough and uneven edges that are constantly shifting.