Setting a very famous Metastasio's libreto Semiramide riconosciuta to music in Prague in 1752, Giovanni Marco Rutini has ranked among the best composers of his time. The aim of this thesis is to explore the process of this production coming to light: the influence of changes in the original libretto in the beginning to the impact of music later. Researching the context of the Prague theatre productions in the 1750s, we were further able to make some suggestions about the reasons of these changes/interpretations. Studying the dramaturgical level of this composition in the first place, we were using comparison and stylistic analytical methods which showed Rutini as a very creative composer with a sense of dramatical situations and a characterization skills. Key words: Giovanni Marco Rutini, Semiramide riconosciuta, Pietro Metastasio, Giovanni Battista Locatelli, Christoph Willibald Gluck, dramaturgy of opera, musical analysis