This article proposes an analysis of Il diritto al viaggio. Abbecedario delle migrazioni (Barbari and De Vana, 2018), examining the Mediterranean migratory phenomenon and reading it as a collective historical possession (nostrum) belonging to Europeans, Africans and Asians, as described by Fernand Braudel’s studies. In addition, based on the interpretation of the terms “Sea”, “Walls”, “Colonialism”, “Europe” and “Rights”, this work presents instruments for a multifaceted reading of migrations. It also offers an interpretation of the Mediterranean as a space for the expression of human rights, and legal and ethical responsibility, presenting the designation nostrum as an idea of sharing responsibilities and rights – meant to include non-territorial waters as well – one that abandons the colonialist conception of conquest and possession of the sea.