Hofburg Imperial Palace which used to be the abode of Habsburg Emperors was transformed into many diverse buildings and sections like Museum, office and even Congress Center by the name of Hofburg Congress Center. The Austrian president has his office in the building and it is of utmost historical importance in Vienna. The state rooms and museums housed in the building are open to the public and on Sundays, the chapel located in it conducts masses. Among the top congress centers of the world, this congress center occupies a glorious position not only due to the appearance but also because of the royal history attached with it.