Caracas, Venezuela ( AFP) — A controversial new Venezuelan assembly packed with allies of unpopular President Nicolas Maduro held its first session on Friday, deepening a rift with the opposition, and with a group of nations led by the US that are calling it illegitimate.

The Constituent Assembly, which has supreme powers over all branches of government as it sees through its task of rewriting the 1999 constitution, was elected last weekend in balloting marred by violence and allegations of fraud.

Its 500-plus-members, who include Maduro’s wife and son, are led by Delcy Rodriguez, Maduro’s former foreign minister.

They took their seats in an ornate oval chamber under a golden dome in the 145-year-old Legislative Palace — in the same building where the opposition-dominated National Assembly is located, albeit in a different room.

The Constituent Assembly has powers to dissolve the National Assembly, if it wishes. Such a move, however, would fuel criticism of it as a rubber-stamp body for Maduro, who critics say is building a “dictatorship.”

The assembly’s members were accompanied to the palace by Maduro and thousands of supporters carrying portraits of late president Hugo Chavez.

“The people today are going back to the assembly building and will never leave,” said one supporter, 72-year-old Euclides Vivas.

The opposition staged protests in the capital on Friday, but there were no signs of the street violence of the past four months that has left a death toll of more than 125.

The Vatican on Friday had urged that the assembly’s session not be held, saying it contributed to “a climate of tension” in Venezuela. It also appealed for Venezuelan security forces to show restraint.

Just hours ahead of the assembly’s inaugural session, Venezuela’s intelligence service unexpectedly transferred a high-profile opposition figure, Caracas mayor Antonio Ledezma, from jail back to house arrest, his family said.

Ledezma and another opposition figure, Leopoldo Lopez, had been taken from their homes to military prison on Tuesday, reversing earlier home detentions.

Lopez remains incarcerated, one of hundreds of people who the opposition says are political prisoners.

The Constituent Assembly marks a new stage in Venezuela’s rule.

Maduro claims the revised charter it will work on will yank Venezuela out of its political and economic crisis, though he has not detailed how. Nor has he given an end date for the Constituent Assembly, which he said would operate for years.