This presentation will give a short overview of the interdisciplinary project Digitization, bibliographic description and research of texts written on Glagolitic, Croatian Cyrillic and Latin scripts until the end of 19th century in Zadar and Šibenik area (further Written heritage) conducted by the Centre for Research in Glagolitism of University of Zadar. Croatian written heritage has a rich corpus of manuscripts and early prints written on three scripts – Glagolitic, Latin and Croatian Cyrillic (called bosanica) scripts, and in three languages – Church Slavonic, Croatian redaction of the Church Slavonic and Latin. The important documents from Mediaeval times onwards, namely diplomatic material, registers, fraternity documents, liturgical and literal works, etc., especially in Zadar island and hinterland, are written on Glagolitic script. Being scattered across many institutions in Croatia and abroad, either not catalogued at all, or catalogued only in the local card catalogues, those manuscripts are often hard to access, and sometimes completely hidden from researchers. The aim of the project Written heritage is to build the digital collection of high-quality digital representations of Glagolitic documents (manuscripts, watermarks, epigraphic monuments including in-situ inscriptions on stones, walls and buildings, inscriptions on clothes, objects, etc.), and to build and integrate databases with structured metadata based on controlled vocabularies and built on the international principles allowing interoperability, sharing and further research, namely visualizations of basic patterns of Glagolitics in Zadar island and hinterland. The main principle of the project is to give the platform and promote interdisciplinary research, sharing of data results and promoting research of Glagolitism within wider research community. Therefore, one of the project goals is to coordinate the interdisciplinary, cross- institutional research of Glagolitics by providing Virtual Research Environment (VRE) which is planned within GlagoLab: Portal and digital laboratory for collaborative research and promotion of the Croatian Glagolitic alphabet. Tools for cooperative transcription and annotation of manuscripts’ texts, as well as crowdsourcing transcription of Glagolitic manuscripts within Civil science initiative, and tools for visualization of (meta)data will be outlined. Also, parts of the planned project concerning Glagolitic manuscripts’ fragments description and reunification of original codicological units will be shown, together with IIIF framework and its usage in storytelling and research of Glagolitic fragments.