Likely one of the most famous buildings in all of Argentina is Casa Rosada. It is the executive mansion and office of the President.
Construction started in 1859, continuing in phases until the 1890s. Prior to that there was a fort on this location dating from the 1500s. The building had served as a customs house and post office before becoming the Presidential Palace.
The same honor guards that man the tomb of San Martin in the Cathedral guard the palace as well, marching back and forth throughout the day.
The Palace is located on the Plaza de Mayo (May).
The courtyard is the home to some excellent palm trees that are 100 years old. Recently one died, and had to be replaced.
The Hall of Busts are of notable Argentinians of the past.
The White Room is used to greet foreign heads of state, as well as the traditional location for the passing of power when a new president is elected, however this year that ceremony moved down the street to the Congress Building.
The tour continued on the 2nd floor.
It took some effort to get tickets to the tour as it is very popular, but well worth the wait.