ca and Antofagasta. However, both treaties left outstanding issues to be clarified in two subsequent treaties, the Treaty of Peace and Friendship between Chile and Bolivia in 1904 and the 1929 Treaty of Lima in Peru
20th century
The Plaza Col�n at the beginning of the 20th century.
The Treaty of Peace and Friendship between Chile and Bolivia, signed on 20 October 1904, and promulgated on 21 March 1905, established in perpetuity border between Chile and Bolivia. The territory of Antofagasta was definitely within Chile's borders but in return Chile agreed to build a railroad that would link the cities of Arica andLa Paz, Bolivia was granted free movement of commerce through Chilean territory
In 1905, the city of Antofagasta began construction of sewers, because of existing outbreaks of bubonic plague and smallpox. The same year was ordered, so unsatisfactory, the closure of public places, in order to prevent the spread of disease.
On 1 February 1906, the railway workers union of the "Ferrocarril Antofagasta a Bolivia" called for a readjustment of working hours, which was rejected. For this reason, on 6 February, from more than 3,000 workers went on strike, marching in protest to the Plaza Colon (main square). The army opened fire on protesters, killing 58 people. The fact is known as the "Massacre of Plaza Colon".
Antofagasta in July 1941
In 1937, the Municipality of Antofagasta made a national call for the composition of Antofagasta's anthem. Antonio Rendic, famous physician and poet of the city, and Juan Bautista Quagliotto, musician, claimed the right to compose the lyrics and music, respectively. On 2 February 1948, the Mayor Juan de Dios Carmona proposed in an open session in the hall of the Municipality, the establishment of 14 February as the day of the celebration of Antofagasta, despite not being the real founding date. Later, after the popular approval, the council approved the date.
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