The article is devoted to the theme of the moral condition during the Black Death epidemic in Florence within Boccaccio’s group of young people in his Decameron. The disease in the region of Florence caused many existential and moral tragedies. A group of young people transferred the joy of life and moral principles to the gardens outside the city of the disease. They describe different moral and philosophical thoughts in their songs at the end of each day.2 These songs represent ten parts of nature and form the basis on which the allegorical character of the works is further developed. They are also carriers of the laws of nature and natural wisdom.