Teofila Konstancja Morawska came from a powerful Lithuanian family of Radziwiłł dukes. However, her husband, Ignacy Feliks Morawski, was a much lower ranked nobleman. In 1773, Teofila Morawska and a small group of her companions set off on a journey through Europe. The route of this journey led through Prussia and other German countries, France, Switzerland, and finally numerous Italian countries. The return journey led, among others, through Austria and the Czech lands. The result of this journey was a diary written by Morawska, in which she described not only the landscapes and monuments visited, but also events connected with the law of the countries where she was allowed to stay. The observations made by her concern the systems of states, administrative regulations, especially those directly affecting travellers, customs and passport regulations, as well as court law. The traveller was particularly interested in the execution of sentences, she described prisons and places of execution. The observations recorded in the diary are usually precise and do not contain gross errors. The traveller above all recorded what she saw or heard, but from time to time she also added her own comments. Some of these remarks may indicate that the traveller was no stranger to the ideas of the Enlightenment.