Mr Tsang pleaded not guilty to three charges of bribery and misconduct, relating to a luxury flat in China.
He is the highest-ranking retired official to be tried for corruption in Hong Kong and faces possible jail time in a case that has worried a city known for its clean reputation.
The former leader was popular when he first took office and was considered competent, and more charismatic than his predecessor Tung Chee-hwa.
72 year old Tsang served as Chief Executive Of Hong Kong between 2005 and 2012.
According to the South China Morning Post, as quoted by the BBC, he first came to power promising a “clean and efficient” civil service.
His term, however ended in scandal when the penthouse claims came to light, launching a three-year inquiry culminating in the trial.
His deputy was also jailed for bribery two years ago.
"I'm getting tired of putting up with being dragged by everyone in my life and…
The governor said he remained resolute in steering Kaduna to the path of progress using…
Spurs have now come from behind to win in four of their last five home…
The Founder of The Chair Centre Group and former Chairperson of First Bank of Nigeria…
He said the current economic realities require that those in authority make sacrifices and not…
The camp was allegedly operated by suspected members of the proscribed group and its militia…