BEGIN:VCALENDAR VERSION:2.0 PRODID:-//pretalx//pretalx.com//spathum24//speaker//MZQZDF BEGIN:VTIMEZONE TZID:CET BEGIN:STANDARD DTSTART:20001029T040000 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 TZNAME:CET TZOFFSETFROM:+0200 TZOFFSETTO:+0100 END:STANDARD BEGIN:DAYLIGHT DTSTART:20000326T030000 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 TZNAME:CEST TZOFFSETFROM:+0100 TZOFFSETTO:+0200 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:pretalx-spathum24-VYFVAS@pretalx.com DTSTART;TZID=CET:20240926T093000 DTEND;TZID=CET:20240926T100000 DESCRIPTION:Studying changes in medieval urban fabric comprises collecting all the available data on preserved and unpreserved parts and using them t o reconstruct what was lost while understanding the processes of changes t hat occurred over centuries.\nThis paper presents a model for structuring and interpreting information on a medieval city and its changes. Its purp ose is to support future hypotheses\, and the final result aims to serve a s 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 u rban fabric\, built in stone\, covers the whole surface of the island and testifies to more than two thousand years of continuous urban life. Due to the excellently preserved medieval and early modern buildings\, Trogir wa s declared a UNESCO World Heritage Site in 1997. On its edge\, the buildin gs that stand out are two High Medieval and one Renaissance tower\, the La te Medieval castle and a portion of the city walls\, which are only a less er part of the former fortifications that protected the city.\nThe time sc ope of the model covers seventeen centuries – from the foundation of the ancient Greek colony around 220 BCE until 1500 CE. A Hellenistic tower ha s protected Trogir’s SE part for over two thousand years. From 220 BCE u ntil 1420 CE\, the city expanded several times. Afterwards\, only modernis ation of the defence system occurred. Little is known about the Hellenisti c\, Late Antiquity and Early Medieval fortifications. Information on the f ortifications protecting the city from the High Medieval and Renaissance p eriods is also fragmented. The author believes the model would make it eas ier to understand how fortifications from these earliest periods were firs t incorporated and then disintegrated within the urban fabric as the city expanded. The model consists of a base map\, seven layers\, each for a dif ferent source type\, and a layer for the hypotheses.\nThis study’s princ ipal source is the urban fabric\, comprising fortifications preserved at f ull height or only in parts above the street level. All known information is collected and presented in the first layer using georeferenced architec tural drawings and plans. The second layer offers all information on remai ns unearthed in archaeological campaigns. They are mapped using the same m ethod as in the first. A critical analysis of historical maps and blueprin ts\, based on the precision by which they were made and the information th ey provide\, led to a selection of just a few. They provide information on buildings that are not preserved in the urban fabric. This information is presented in the third layer after georectification. Information on the f orm of dismantled parts of the fortifications\, provided in old photograph s\, is delivered in the third layer. The next\, similarly\, offers those f rom critically analysed vedute (historical cityscapes). Information from t hese visual sources\, presented in the third\, fourth and fifth layers\, p rovide only quality information on the no longer extant buildings. The las t two layers contain information from written sources: late medieval archi val documents\, consisting predominantly of notarial acts (preserved in fr agments from 1263 until 1500)\, and local historiographical text. These te xtual sources provide information on the former existence of different par ts of the fortifications\, on construction\, builders and commissioners of both extant and no-extant parts of the fortifications\, and on their owne rs and tenants and the way they used it\, revealing thus details on their former forms and changes. \nIn the first three layers\, polygons are used 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 forti fications\, visible in sources\, are presented in lines as projections. Te xts are presented with points\; each document or information from a histor iography book is a separate entry. The colours represent periods during wh ich a portion of the fortifications had been constructed\, and they are ap plied to all inserted symbols. The periods are Hellenistic (around 220BCE) \, Late Antiquity (4th to 7th century CE)\, High Medieval (before 1200\, p redominantly the 12th century CE)\, Late Medieval (between 1200 and 1470 C E)\, and Renaissance (after 1470 CE). \nEach inserted symbol is provided w ith an annotation. First\, there is metadata: ID number\, name of the buil ding\, state of preservation\, period (which resembles the periods present ed with colours)\, date of the construction\, when available\, and referen ce 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 me thod of dealing with it is explained. It differs from source to source and data to data\, offering interpretation within the limits of argumentation . Third\, each annotation is provided with an illustration of a source an d the caption. Archival documents are supplied with photos\, transcription of the relevant part and a regesta (summary). In the seventh layer are il lustrations of the historical book pages. They are written in Latin or a l ocal idiom of Italian\, so summaries are added.\nThe layers overlap and ar e transparent\, and they are laid over a base map representing contemporar y urban built fabric in 2024. Together\, they demonstrate the existing inf ormation on the fortifications and the limits of our knowledge.\nThis meth odology 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 pr esented in a separate layer\, using dashed lines to distinguish it from th e different symbols. The dashed line’s width resembles the width of the High Medieval walls\, which are known from the preserved remains. The auth or expects the model to lead to new hypotheses about the locations of the fortifications that decayed over centuries (especially the Hellenistic\, L ate Antiquity and High Medieval ones) and to formulate principles of their changes and integration into the urban fabric. DTSTAMP:20260514T012009Z LOCATION:MG1/02.05 SUMMARY:The changes in the fortifications of the city of Trogir from 220 BC E until 1500 CE. Enhancing new hypotheses on medieval urban fabric using G IS model - Ana Plosnić Škarić URL:https://pretalx.com/spathum24/talk/VYFVAS/ END:VEVENT END:VCALENDAR