The Grand Hotel's Crystal Hall is the largest and most important cultural monument in Rogaška Slatina. The original hall was built in the first half of the 19th century, during the renovation of Hotel Zdraviliški Dom. It was decorated with magnificent Venetian chandeliers, precious paintings, and impressive marble pillars. As soon as it was built, it began hosting famous names, most notably the world famous pianist Franz Liszt in 1846.

The Crystal Hall has hosted numerous concerts, recitals, theatre performances, and women's circles. The social highlight of every summer was the exclusive Anna's Ball. Hotel Zdraviliški Dom was destroyed by fire in 1910, but it had taken only two years before it was replaced by the new Grand Hotel Rogaška with its own Crystal Hall. The hall's major attraction is the collection of four oil paintings made by Austrian painter Schröter in 1912, depicting important landmarks and key people throughout the development of the Rogaška Health Resort. Also notable are five handmade chandeliers from the Steklarna Rogaška glass factory.

Today, the Crystal Hall still serves it original purpose. It provides an excellent venue for business events such as congresses, meetings, and education seminars. Its sophisticated equipment and good acoustic properties make it an ideal place to stage prominent concerts and organize balls. Even the most demanding newlyweds are mesmerized by luxurious wedding ceremonies in the magnificent Crystal Hall.

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