On the first day of her trial, Park denied charges of corruption, coercion and leaking confidential information. The proceedings are likely to last for several months.
Park entered the Seoul Central District Court building wearing handcuffs and a dark blue suit emblazoned with a badge identifying her as prisoner 503. Once in the courtroom, she bowed slightly toward lawyers and when asked by the judge what her occupation was, she replied: "I don't have any occupation."
South Koreans have been eagerly anticipating the trial of the country's first female president
, who spent both her youth and later years in the Blue House -- the country's equivalent to the White House.
Some 500 people had lined up on Friday at Seoul court to apply for one of 68 courtroom seats to get a ringside view. One woman, who had lined up for an hour and didn't want to give her name, told CNN that she wanted to see the trial because she wanted "to view justice, to see it play out with her own eyes."
Those who didn't get a seat will be subject to blanket coverage from the South Korean media, although the trial itself won't be televised.
"I am very curious about whether she is going to receive a fair public trial just like any civilian without special treatment," said 29-year-old Kim Han-min.
''They abused power'
She was accused of being unduly influenced by her longtime friend and adviser, Choi Soon-sil, who is also on trial for abuse of power and fraud. The court that upheld her impeachment her agreed with accusations that Park had abused her authority in helping Choi raise donations from companies for foundations she had set up.
Park's removal from office cleared the way for criminal proceedings, as South Korean presidents face immunity from prosecution. If convicted, she could spend the rest of her life in prison.
"Park Geun-Hye, in collusion with her friend Choi Soon-Sil, let Choi -- who had no official position -- intervene in state affairs ... and they abused power and pressured business companies to offer bribes," prosecutor Lee Won-Seok said in court Tuesday.
Choi was also in court Tuesday but Park appeared to avoid looking at her former confidant.
"I've been serving for the president for the past four decades, and I feel really sorry ... President Park is not a person who could be lured by bribes," Choi said, half sobbing. She also denied the charges.
"President Park has worked only for the country," Choi said.
Also indicted in the trial is Lotte chairman Shin Dong-bin, a billionaire businessmen who was allegedly involved in bribery.
Previous presidential trials
In 1995, former presidents Chun Doo-hwan and Roh Tae-woo were charged for military mutiny, treason and graft.
Chun was initially sentenced to death penalty while Roh was sentenced to 22 years in prison. Their sentences were reduced later to life imprisonment and 17 years respectively, and two years later, they were released. Then president Kim Young Sam granted them a pardon, a decision which resulted in violent protests.
Park's trial takes place just two weeks after South Korea elected a new president, liberal reformer Moon Jae-in,
who campaigned on clean government.