Around 20,000 people protested in Thailand's capital on Saturday against the government of former coup leader and Prime Minister Prayuth Chan-ocha, with many demonstrators also calling for reforms to the monarchy.
"Down with feudalism, long live the people," was one of the chants at the biggest demonstration in Bangkok since Prayuth took power in a 2014 coup.
Protests have been building in the southeast Asian country since mid-July, demanding the removal of the government, a new constitution and elections.
They have also broken a long-standing taboo by criticizing the monarchy of King Maha Vajiralongkorn.
Saturday's protests moved from the campus of Thammasat University, a traditional hotbed of opposition to the military and royalist establishment, on to Sanam Luang - translated as Royal Field - outside the Grand Palace.
"I hope the people in power will see the importance of the people," student leader Panupong "Mike" Jadnok, told the crowd. "We are fighting to put the monarchy in the right place, not to abolish it."
Organizers said there were 50,000 people present in the latest demonstration. Police said there were at least 18,000, still enough to make it bigger than a protest last month. Protesters have said they plan to stay overnight and march to Government House on Sunday morning.
The king was not in Thailand and has spent much of his time in Europe since taking the throne from his late father in 2016. The Royal Palace was not available for comment on the protests.
"People can protest but they should do that peacefully and within the law," said government spokesman Anucha Burapachaisri.
Sept. 19 is the anniversary of the coup against the populist then-prime minister Thaksin Shinawatra in 2006. Among the protesters were many of his red shirt followers, veterans of clashes a decade ago with pro-establishment yellow shirts.
"I'm here to fight for the future of my children and grandchildren. I hope that by the time I die, they will become free," said 68-year-old Tasawan Suebthai, a redshirt with amulets round her neck which she hoped would ward off bullets.
So far, the latest protests have been peaceful.
Prayuth has said the government would allow protests but that demands for reform of the monarchy were not acceptable.
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Protesters demand the scrapping of a lese majeste law against criticism of the monarchy. They also seek to reduce the king's constitutional powers and his control over the palace fortune and units of the army.
The last time such a large crowd assembled at Sanam Luang was in mourning for the late King Bhumibol Adulyadej, who was widely revered in the country of 70 million.
There were also sympathy protests in Taipei and Tokyo while others were planned in Europe and North America.