What is "lauburu"

The lauburu or Basque cross (, "four heads") is a traditional Basque swastika with four comma-shaped heads. Today, it is a symbol of the Basque Country and the unity of the Basque people. It is also associated with Celtic peoples, most notably Galicians and Asturians. It can be constructed with a compass and straightedge, beginning with the formation of a square template; each head can be drawn from a neighboring vertex of this template with two compass settings, with one radius half the length of the other.