In 1914, Euzkeltzale-Bazkuna, the group promoting the Basque language in the Bilbao branch of the Basque Nationalist Party proposed a swastika as a silver lapel pin to mark Basque speakers. They considered the curvilinear lauburu and the rectilinear swastika as primitive Basque symbols. Later "Euzkadi" advertised the sale of this badge, the "euskalorratza", "Basque needle". As time passed, it became associated to Basque nationalism. Its use became more common from 1931 and the Second Spanish Republic. Giant swastikas were painted in the campaign for the Basque Autonomy Act of 1933.