The Thirteenth International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage—DiPP2023 was held from 7 to 10 September 2023 in Burgas. DiPP2023 is organized under the patronage of UNESCO and Burgas Municipality and is partly funded by the National Scientific Fund of Bulgaria. 35 papers and several national and international projects on digital preservation and presentation of cultural and scientific heritage were presented. The forum was attended by more than 70 participants. The papers were published in a volume of proceedings of the conference as well as online at: http://dipp.math.bas.bg. DiPP2023 conference web site is: http://dipp2023.math.bas.bg. Special attention was given to the Workshop on Promoting the Green Transition through University Education on Green Standards, organized in the frame of the B-Green-ED project, and the Information Day Research Infrastructure Services in the Humanities and Social Sciences, organized in the frame of the CLaDA-BG, the Bulgarian National Interdisciplinary Research e-Infrastructure for Resources and Technologies in Favor of the Bulgarian Language and Cultural Heritage, Part of the EU Infrastructures CLARIN and DARIAH. Traditionally, the Workshop and national information day Open Access to Scientific Publications, Data and Data Science, Bulgarian Open Science Cloud were organized.