A3D - architects. Residential projects, interior projects, public building design. Interior designers.


Architectural Studio „Atelje 3D“ was founded in 1991 by certified Architect and Project Manager Marius Šlancius. Architect and interior designer Aureja Slance joined in 2001. Together they continued to design and develop new public and residential buildings. Atelje 3D has been developing for over 20 years.

In 2010, the company was reorganized into LLC A3D design company. „Strongest in Lithuania“ certificate was given by Creditinfo in 2017. The company carries out projects of public buildings, residential houses and other purpose buildings, develops engineering systems of buildings, territories and well-being, small architectural objects, interior design projects. The head of the company, architect Marius Šlančius has gained extensive experience working with heritage objects. He is a certified specialist in the field for the development of architectural projects of heritage conservation works.

A3D company projects are awarded by the most significant Lithuanian architectural and interior design awards. For two years in a row, architects have been awarded as the best private interior designers in Lithuania. A3D architects successfully participated in large-scale architectural competitions, are the winners of several prize-winning competition projects. All projects in the A3D are carried out with the help of qualified specialists. International design experience allows to work with private and commercial objects in Lithuania and abroad.

Our design goals:

Our architects aim to realize your visions, starting with an idea, ending with the withdrawal of a building permition, the final execution of the project. During the design process, we focus on dialogue and research. By listening carefully and sharing ideas, we always strive to find the best, unique solution that reflects the most functional and innovative decisions. We are sure thet a professional and high quality building project or interior design reduces your expenses today and increases the value of your property in the future.


Marius Slancius

Founder and Chief Architect

Degree in VDA/ Vilnius Academy of Arts

Experience and internships in Sweden, Norway, Jerusalem.

License nr. A 227

Heritage protection certificate nr. 3124

Aureja Slance

Chief Architect, Interior designer

Master’s degree at KTU / Kaunas University of Tehnology.

Experience and internships in USA, Denmark.