The ODAM group (‘Organization in Defense of Modern Architecture’) was created in Porto, Portugal in 1947, constituted by thirty-four architects, all graduates or students of the School of Fine Arts of Porto (EBAP), and remained active until 1952. The group joined with another group of modern architects from Lisbon in an important meeting of efforts crucial for the success of the First National Congress of Architecture held in 1948. In 1951, ODAM held an important exhibition at the Ateneu Comercial do Porto and that same year the group contributed decisively to the modernisation of the teaching of Architecture at the EBAP, with the hiring of four of its members as Assistant Teachers on the Architecture course. ODAM held its last exhibition in 1952 in Aveiro, and even after its collective activity ceased, its existence was undeniably important for the constitution of a Portuguese delegation of CIAM, which started in 1951, and remained until its cessation, in Otterlo, in 1959.