We are developing Digital Archive as a digital web repository of materials about, and by, some of the most important Serbian scientists. It preserves books, manuscripts, photos, letters and various important papers that belonged to Anton Bilimovič, Bogdan Gavrilović, Đuro Kurepa, Jovan Karamata, Mihailo Petrović Alas and Milutin Milanković. Open source software DSpace is used for building this repository. DSpace is used by over 1000 organizations worldwide and it has the largest community of developers among all of the repository software platforms. It is completely customizable in many ways, including the look of the web interface, metadata used to describe fields, browse and search criteria, local authentication mechanisms and multilingual support. We present the usage of some of the DSpace features on the sub-repository dedicated to Milutin Milanković.