As many as 300,000 protesters marched through the Bahraini on Monday night, as opposition Shi'ite demands for change intensify.
Bahrain state television aired pictures of the march stretching back hundreds of metres along the road.
Throughout the day, thousands once again packed Pearl Square, demanding the release of political prisoners and a true constitutional monarchy that gives citizens a greater role in a directly elected government.
Although Shi'ite Muslims account for about 70 percent of the population, they are a minority in Bahrain's 40-seat parliament due to an electoral process that they say shuts them out.
The government led by the Khalifa family denies that it treats Shi'ites unfairly.