The crowds filled a major traffic circle in the heart of the city today and sprawled into its main thoroughfares.
The demonstrators waved "We Are Indonesia" signs and a giant red-and-white national flag was held aloft by hundreds of people.
Jakarta has been rocked in the past month by two major protests against Gov. Basuki "Ahok" Tjahaja Purnama, who is being prosecuted for alleged blasphemy.
A demonstration against him on Friday drew at least 200,000 people. An anti-Ahok protest on November 4 attracted at least 100,000 people and turned violent.
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