Oral native heritage is considered a cultural value that represents the identity of the individual and creates a sense of belonging to the community. It has been transmitted in unwritten form for centuries and has been nurtured for generations. The aim of this paper is to show the life of Saint Foška from her birth to her death, as well as the perseverance of the saint in achieving her goal - the knowledge 6 of God. Along the way, St. Foška struggled with the displeasure of her own parents over their choice of religion and way of life according to God’s law. The paper especially presents the presence of the cult of St. Foška and the period of her adolescent drama in which she grows from a child to an adult. Despite the displeasure of her parents, who opposed her decisions, Foška turned into a girl who nevertheless achieved spiritual peace in prayer and the faith she felt towards God. Today, the works of St. Foška have the meaning and value of a saint among the citizenry and Christians, and her cult glorifies the act of a brave saint. Many churches were built in honor of her holy fighting spirit and perseverance, especially in Istria. This paper presents the cult of the saint in the oral native heritage of Istria as well as its church architecture in the Istrian area.