The so-called Political Testament, written by Charles Eusebius the Prince of Liechtenstein for his son and heir around 1680 includes, among other things, a substantial, detailed passage dedicated to music at the prince's court. Music is not just one element of court representation here. This key aspect, in the text of the instruction, comes with a detailed insight to possible problems with a music ensemble, as well as with the use and character of individual instruments. This study focuses primarily on the status of musical ensembles and musicians within the structure of the aristocratic court, beginning with Charles I (d. 1627), through a partial analysis of the situation at the court of his son Charles Eusebius (d. 1686) and finally brings an outline of the role of musicians and musical life with the third generation of princes from Liechtenstein. Certain continuity can be assumed, in particular, in attempting to adapt its own court to princely habits (for example, as regards the minimum number of trumpeters etc). In general, however, it must be stressed that the trumpeters or the trumpeter ensemble constituted an essential part of the princely court, whereas the existence of a musical ensemble always depended on the actual needs, preferences and economic possibilities of a particular prince.