Many of the protesters are associated with political groups connected to former President Jean-Bertrand Aristide, a former Catholic priest who served as Haiti's first democratically elected president. He was ousted in a 2004 coup d'etat during his second term in office. He returned to Haiti in 2011 after seven years in exile.
Political graffiti is ubiquitous in Haiti's capital, Port-au-Prince. A section of this graffiti refers to President Martelly as a kidnapper.
Opposition protesters rally the crowd at the start of Friday's demonstrations.
Friday's protests against Martelly were largely peaceful, though demonstrators lit a number of fires.
A musician riles up opposition demonstrations ahead of Friday's march.
After leaving the area known as St. Jean Bosco, demonstrators marched through downtown Port-au-Prince encouraging people to join.
Martelly took office in 2011. Many protesters accuse him of corruption, mismanagement of the 2010 earthquake relief funds, and cronyism.
Onlookers above the path of opposition protesters.
Stervel Mackingson (not pictured), an opposition activist marching Friday, called for Martelly to resign. "He made us believe that he wanted Haiti become a paradise," Mackingson said. "But Martelly made things worse."
Andre? Michel is a lawyer pursuing corruption charges against Martelly and his family. This sign calls Michel "the lawyer of the people."
Protesters used tires to block the road and prevent police vehicles from approaching.
Opposition activists claim there were 15,000 protesters, though it is impossible to confirm that number. This sign says in Haitian Creole, "Live by the ideals of Desaline," a founding father of Haiti.
Haiti's police are trained by the UN Mission in Haiti, known by the acronym MINUSTAH.