Hofbau Palace is the imperial palace in the centre of Persenburg, Karnia-Ruthenia. Part of the palace forms the official residence and workplace of the Emperor-King of Karnia-Ruthenia. Built in the beggining of 20th century, the palace houses one of the most powerful families in the micronational and Karno-Ruthenian history, including monarchs of the House of Götzö-Thomaz-Rocha, rulers of Karnia-Ruthenia. It is the principal imperial residence.
The name Hofbau has its origin in German words Hof, which means court and Bau, which in turn means building, construction. The idea behind the name derives from the fact that as a young empire, the Imperial Court was still being built gradually.
The Hofbau in Persenburg is the official imperial residence. From late 1919 to 2014, it was the seat of the House of Goëtzën and its branch, the House of Götzö-Thomaz-Rocha, thereafter the seat of the King of Ruthenia until 2016, when it became the official seat of the Karno-Ruthenian Emperor.
At the time of the foundation of the Kingdom of Ruthenia, the place was called the Winter Residence, whereas the capital at the time was Alto da Solidão and there already was another residence. However, with the transfer of the capital to the south of the Kingdom of Ruthenia, the current Persenburg, formerly known as Royal District, the residence of the dynasty became the seat of the Court and the Government.
In 2016, after the signing of the Karno-Ruthenian Compromise of 2016, the Karno-Ruthenian Empire was established. The Palace continued as an administrative center and at this time it was renamed the Hofbau Palace, remaining the formal seat of the Court and the monarch's workplace, as much as his official residence.