Thousands of Thais took the streets of the capitol Bangkok on Sunday demanding reforms to the monarchy.
Protesters marched, waving placards that read, “no absolute monarchy” and “reform is not abolition.”
Demonstrations come after the country’s highest court ruled last week that a call for reforms to the monarchy was unconstitutional and intended to topple the system, but one protester in Sunday’s crowd said reform does not mean abolition.
"Authorities only want to do the things they want and see people with opposing views as the bad guys, so they think that we're trying to topple them. If society continues like this, how can we move forward?"
The youth-led protests that began last year are the biggest challenge in decades to the establishment, long dominated by the army and the palace.
They have called for the removal of former coup leader, Prime Minister Prayuth Chan-ocha and reform to the powers of King Maha Vajiralongkorn.
Protests have broken longstanding taboos of talking about monarchy reform in Thailand.
Citizens face up to 15 years imprisonment for insulting or defaming the monarchy.
At least 150 people have been charged since last year, according to records compiled by a legal human rights group.