Forty-one of those held were marched into the court outside Ankara one-by-one in a long line in front of television cameras and the public, with each suspect held by two members of the Turkish gendarmerie and flanked by an armed soldier.
People chanted "we want the death penalty!" -- which was abolished in 2004 -- and some threw nooses towards the suspects.
There were also chants of "martyrs don't die, the nation won't be divided". Some people threw water bottles, an AFP reporter said.
A total of 486 suspects have been indicted in the case and almost all -- 461 -- are held in custody while seven are still on the run and the remainder charged but not in jail.
During the tense opening hearing, veterans and relatives of those killed on the night of the coup bid booed the suspects' lawyers, Dogan news agency reported.
Some lawyers hit tables to protest the "physical intervention" by some of the victims' families as they walked past them, the agency said.
They are charged with crimes ranging from murder, violating the constitution and attempting to kill President Recep Tayyip Erdogan.
If convicted, they face life imprisonment.
Among the main suspects named in the indictment but still on the run is US-based Muslim cleric Fethullah Gulen, who is accused of ordering the attempted July 15, 2016 putsch.
Gulen, who is based in a secluded compound in the US state of Pennsylvania, strongly denies the charges.
Another chief suspect is theology lecturer Adil Oksuz, whom Turkish officials accuse of being the so-called "imam" of the plot by coordinating the action on the ground in Turkey with Gulen.
Businessman Kemal Batmaz is meanwhile accused of assisting Oksuz.
Oksuz was detained following the coup's defeat, but was subsequently released and is now on the run.
Batmaz led the line of suspects into court wearing a cream shirt with black trousers followed by Ozturk wearing a grey shirt and black trousers.
The base was seen as the coup plot headquarters where commands were given for the F-16 fighter jets to attack and fly them above the capital.
The Turkish parliament was bombed three times by F-16s.
The trial is taking place in Turkey's largest courtroom established inside a prison complex in Sincan to hear coup- related trials and has space for more than 1,500 people.
The deputy leader of the ruling Justice and Development Party (AKP), Hayati Yazici, told reporters the party made a request to be a co-litigant in the trial.
Erdogan, Akar and the main opposition Republican People's Party (CHP) also applied to be litigants, Turkish media said.
The courtroom has previously hosted mass trials related to the coup bid including one which opened in February of 330 suspects accused of murder or attempted murder.
And in May, 221 suspects were put on trial accused of being the ringleaders of the failed coup.
There was heavy security including 1,130 security personnel inside and outside the courtroom, according to state-run news agency Anadolu, as well as snipers, armoured security vehicles and a drone.
Over 50,000 people have been arrested over alleged links to Gulen in a wide-scale crackdown under the state of emergency imposed following the coup.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
