BEGIN:VCALENDAR VERSION:2.0 PRODID:-//pretalx//pretalx.com//spathum24//talk//VYFVAS BEGIN:VTIMEZONE TZID:Europe/Amsterdam BEGIN:DAYLIGHT DTSTART:20230927T000000 TZNAME:CEST TZOFFSETFROM:+0200 TZOFFSETTO:+0200 END:DAYLIGHT BEGIN:STANDARD DTSTART:20231029T030000 RDATE:20241027T030000 TZNAME:CET TZOFFSETFROM:+0200 TZOFFSETTO:+0100 END:STANDARD BEGIN:DAYLIGHT DTSTART:20240331T030000 RDATE:20250330T030000 TZNAME:CEST TZOFFSETFROM:+0100 TZOFFSETTO:+0200 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT SUMMARY:The changes in the fortifications of the city of Trogir from 220 B CE until 1500 CE. Enhancing new hypotheses on medieval urban fabric using GIS model - Ana Plosnić Škarić DTSTART;TZID=Europe/Amsterdam:20240926T093000 DTEND;TZID=Europe/Amsterdam:20240926T100000 DTSTAMP:20260818T182634Z UID:pretalx-spathum24-VYFVAS@pretalx.com DESCRIPTION:Studying changes in medieval urban fabric comprises collecting all the available data on preserved and unpreserved parts and using them to reconstruct what was lost while understanding the processes of changes that occurred over centuries.\nThis paper presents a model for structuring and interpreting information on a medieval city and its changes. Its pur pose is to support future hypotheses\, and the final result aims to serve as a prototype for similar urban studies. \nThe city that has been studied is Trogir\, located on a small island on the eastern Adriatic coast. The urban fabric\, built in stone\, covers the whole surface of the island and testifies to more than two thousand years of continuous urban life. Due t o the excellently preserved medieval and early modern buildings\, Trogir w as declared a UNESCO World Heritage Site in 1997. On its edge\, the buildi ngs that stand out are two High Medieval and one Renaissance tower\, the L ate Medieval castle and a portion of the city walls\, which are only a les ser part of the former fortifications that protected the city.\nThe time s cope of the model covers seventeen centuries – from the foundation of th e ancient Greek colony around 220 BCE until 1500 CE. A Hellenistic tower h as protected Trogir’s SE part for over two thousand years. From 220 BCE until 1420 CE\, the city expanded several times. Afterwards\, only moderni sation of the defence system occurred. Little is known about the Hellenist ic\, Late Antiquity and Early Medieval fortifications. Information on the fortifications protecting the city from the High Medieval and Renaissance periods is also fragmented. The author believes the model would make it ea sier to understand how fortifications from these earliest periods were fir st incorporated and then disintegrated within the urban fabric as the city expanded. The model consists of a base map\, seven layers\, each for a di fferent source type\, and a layer for the hypotheses.\nThis study’s prin cipal source is the urban fabric\, comprising fortifications preserved at full height or only in parts above the street level. All known information is collected and presented in the first layer using georeferenced archite ctural drawings and plans. The second layer offers all information on rema ins unearthed in archaeological campaigns. They are mapped using the same method as in the first. A critical analysis of historical maps and bluepri nts\, based on the precision by which they were made and the information t hey provide\, led to a selection of just a few. They provide information o n buildings that are not preserved in the urban fabric. This information i s presented in the third layer after georectification. Information on the form of dismantled parts of the fortifications\, provided in old photograp hs\, is delivered in the third layer. The next\, similarly\, offers those from critically analysed vedute (historical cityscapes). Information from these visual sources\, presented in the third\, fourth and fifth layers\, provide only quality information on the no longer extant buildings. The la st two layers contain information from written sources: late medieval arch ival documents\, consisting predominantly of notarial acts (preserved in f ragments from 1263 until 1500)\, and local historiographical text. These t extual sources provide information on the former existence of different pa rts of the fortifications\, on construction\, builders and commissioners o f both extant and no-extant parts of the fortifications\, and on their own ers and tenants and the way they used it\, revealing thus details on their former forms and changes. \nIn the first three layers\, polygons are use d to reveal the perimeters of the buildings or the width and length of the parts of the walls. In the following two layers\, the facades of the fort ifications\, visible in sources\, are presented in lines as projections. T exts are presented with points\; each document or information from a histo riography book is a separate entry. The colours represent periods during w hich a portion of the fortifications had been constructed\, and they are a pplied to all inserted symbols. The periods are Hellenistic (around 220BCE )\, Late Antiquity (4th to 7th century CE)\, High Medieval (before 1200\, predominantly the 12th century CE)\, Late Medieval (between 1200 and 1470 CE)\, and Renaissance (after 1470 CE). \nEach inserted symbol is provided with an annotation. First\, there is metadata: ID number\, name of the bui lding\, state of preservation\, period (which resembles the periods presen ted with colours)\, date of the construction\, when available\, and refere nce to a publication. Second\, there is a short description of each source and an explanation of the data it provides. In cases of ambiguities\, a m ethod of dealing with it is explained. It differs from source to source an d data to data\, offering interpretation within the limits of argumentatio n. Third\, each annotation is provided with an illustration of a source a nd the caption. Archival documents are supplied with photos\, transcriptio n of the relevant part and a regesta (summary). In the seventh layer are i llustrations of the historical book pages. They are written in Latin or a local idiom of Italian\, so summaries are added.\nThe layers overlap and a re transparent\, and they are laid over a base map representing contempora ry urban built fabric in 2024. Together\, they demonstrate the existing in formation on the fortifications and the limits of our knowledge.\nThis met hodology of using all the available data from all kinds of sources already led the author to hypothesise on the former site of a portion of the High Medieval city walls and a tower. The hypothesis was published in 2007 and has been accepted by other scholars studying Trogir. This hypothesis is p resented in a separate layer\, using dashed lines to distinguish it from t he different symbols. The dashed line’s width resembles the width of the High Medieval walls\, which are known from the preserved remains. The aut hor expects the model to lead to new hypotheses about the locations of the fortifications that decayed over centuries (especially the Hellenistic\, Late Antiquity and High Medieval ones) and to formulate principles of thei r changes and integration into the urban fabric. LOCATION:MG1/02.05 URL:https://pretalx.com/spathum24/talk/VYFVAS/ END:VEVENT END:VCALENDAR