This article was automatically translated from the original Turkish version.
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The Haymarket Affair was a historical event that occurred on May 4, 1886, in Chicago, United States, beginning with a bomb detonated during a labor rally, resulting in deaths and injuries. This event is regarded as one of the pivotal moments in the history of international labor movements and is considered one of the key reasons for the establishment of May 1 as International Workers' Day.
In the second half of the 19th century, rapid industrialization and urbanization took place in the United States alongside the Industrial Revolution. This process meant long working hours, low wages, and insecure conditions for workers. The demand to limit the workday to eight hours sparked a widespread movement among laborers.
On May 1, 1886, strikes involving approximately 300,000 workers took place across the United States. Chicago became one of the central hubs of these strikes. During a peaceful rally held at Haymarket Square on May 4, 1886, an unidentified individual threw a bomb into the crowd; the explosion killed one police officer and injured many others, both police and workers. The situation escalated further due to a harsh crackdown by police forces.
In the aftermath of the incident, eight labor leaders—Albert Parsons, August Spies, Samuel Fielden, Oscar Neebe, Michael Schwab, George Engel, Adolph Fischer, and Louis Lingg—were arrested and tried largely on circumstantial evidence. The trial was widely viewed as a violation of legal standards. As a result, four defendants were executed, one committed suicide in prison, and the others received long prison sentences. In 1893, Illinois Governor John Peter Altgeld pardoned the remaining defendants.
The Haymarket Affair became a powerful symbol in the global struggle for workers’ rights and union movements. In 1889, the Second International, meeting in Paris, declared May 1 as International Workers’ Day to honor the Haymarket martyrs and to emphasize the demand for an eight-hour workday. Since then, May 1 has been celebrated in various countries as a day of worker solidarity. The Haymarket Affair highlighted the difficulties and significance of the fight for labor rights and has become a universal expression of the need for a just system based on labor.

Monument erected in honor of the Haymarket Affair in Chicago, Illinois, United States (Mary Brogger)
A series of monuments have been erected in Chicago to commemorate the Haymarket Affair. The first Haymarket Police Monument was erected in 1889 to honor the police officers who lost their lives during the incident. Over time, this monument was targeted in multiple attacks and relocated several times.
To fulfill a broader need for commemoration, a new Haymarket Monument, designed by Mary Brogger 【1】, was unveiled in 2004. The monument is located at the intersection of Desplaines and Randolph Streets in Chicago. Brogger’s design symbolizes solidarity and freedom of expression, depicting a labor speaker on a podium surrounded by figures representing the crowd. Each year on May 1, unions and various social organizations visit and honor the monument during commemorative events.
[1]
Mary Brogger, Amerikalı bir heykeltıraş ve kamusal alan sanatçısıdır.
Özellikle 2004 yılında Chicago'da dikilen Haymarket Anıtının tasarımcısı olarak tanınır.
Eserlerinde toplumsal hareketler, dayanışma ve tarihî hafıza temalarını işler.
Brogger, Mary. "Home." Mary Brogger Resmî Web Sitesi. 26 Nisan 2025 https://marybrogger.com/.
Historical Context
The Haymarket Trial and Its Consequences
Impact and Legacy of Haymarket
The Haymarket Monument