What changes did the 1986 constitutional revision make to the Greek presidency?

The 1986 constitutional revision in Greece significantly altered the role of the president by stripping the office of its previously extensive authority, rendering the position largely ceremonial.1

Prior to this change, the constitution established in 1975 had granted the president considerable powers. This earlier framework, which had been designed to strengthen the presidency compared to its historically ceremonial status, was effectively reversed by the 1986 amendments to ensure that executive authority remained primarily with the prime minister and the government.12