The palace is in Neoclassical style, largely made of white marble with elaborately furnished interiors, especially in the Lost Steps Hall and the Blue Room.

[8] In 1997, with the first general restoration of facades, representatives of the Government of Buenos Aires promoted the recovery of the statues designed by Lola Mora to crown the entrance to Congress.

As the sculptor had personally donated to the government of province of Jujuy, the only thing possible was to make rubbings to place in Buenos Aires.

The government of Jujuy reaffirmed its ownership of the statues of Mora, so that Congress signed a treaty for the restoration of the original and creating two copies of each work by a 3D mapping, which began in January 2013. the original had suffered deterioration caused by hundred years of outdoor exposure, so it must be kept in a closed and adequate space, while one group of rubbings will be placed in its place in the Government House of Jujuy, and the other set of rubbings will be placed in the original spaces of the National Congress.

On 1 March 2014 replicas of the statues were inaugurated by President Cristina Fernandez de Kirchner at the opening of the regular session.