Tijekom istraživanja arhivskog fonda don Luke Jelića u Arheološkom muzeju u Splitu, autorica je uvidjela da postoji dio neobjavljene dokumentacije u kojoj se opisuju biogradski spomenici. U Jelićevim Izvještajima s istraživanja u Biogradu od 1902. do 1905. donose se podatci o sljedećim lokalitetima: biogradska katedrala na Glavici, starokršćanska bazilika sv. Marije (?) u vrtu Artura Jeličića, bazilika sv. Ivana Evanđelista kod kaštela Matkovića te crkvica u vrtu Joze Dokoze. Bazilika sv. Tome sa ženskim benediktinskim samostanom tek se usputno spominje i pozicionira u JI dio grada, gdje inače don Luka Jelić ucrtava tzv. položaj „tri crkve“. Upravo takva opisana situacija s označenim lokalitetima navela je autoricu da se pozabavi problemom ubiciranja biogradskih ranosrednjovjekovnih bazilika, a tako i njihovih benediktinskih samostana, za koje je poznato da su podignuti u vrijeme hrvatskog kralja Petra Krešimira IV. U daljnjem tumačenju spomenute problematike iznimno je važno i pozicioniranje „starokršćanske bazilike sv. Marije“, koju Jelić smješta SZ od biogradske katedrale, u vrtu Artura Jeličića.The city of Biograd flourished during the reign of Croatian King Petar Krešimir IV. (1058 - 1074). This period was of exceptional importance for the city and the church likewise, because that is when two Benedictine monasteries were founded, within which large three-nave basilicas were built. In the document of Petar Krešimir IV, where the king donated the property to the monastery of St John the Evangelist, we have the first concrete data on the organisation of the Diocese of Biograd with the mention of the Bishop of Biograd Theodosius.
The monuments of Biograd attracted the attention of many historians, archaeologists and art historians, but also that of travel writers. As early as the end of the 19th century, Don Luka Jelić showed interest in researching church architecture in the Biograd area. Namely, in his article "Historical and Topographical Sketches of the Biograd Coast," he made his first observations about Biograd monuments. In 1902, he began the first archaeological excavations at the Glavica site, where he discovered the remains of the former Biograd Cathedral. In 1905, Jelić started researching the "early Christian Basilica of St. Mary", located northwest of the cathedral, in the garden of Artur Jeličić. All manuscripts from these investigations are preserved in Jelić\u27s archive holding in the library of the Archaeological Museum in Split. From this archival material, it follows that Don Luka Jelić, but also a significant number of "older" researchers, bring completely different title-bearers from those that appear in the relevant literature of the last century. Thus, at the position of the Basilica of St. John the Evangelist, Jelić means "the early Christian basilica of St Mary", and St. John and the Benedictine monastery are positioned near the town citadel. These are essential complexes of early medieval sacral architecture, built thanks to the Croatian ruling dynasty in the 11th century. Due to the importance of the sites, the author analysed all available archival material and literature, as well as the material remains to answer the question about where Benedictine basilicas in Biograd were located and to whom they were dedicated in the past
