About us
Our foundation, PDKEKA, created the Heritagebuilder.eu website as its first major project, with the mission to digitally preserve the architectural heritage of Central and Eastern Europe. We believe that our region’s beautiful, diverse, and often overlooked built environment deserves to be safeguarded in digital form — so that its beauty and its stories remain accessible for future generations.
Our goal is to ensure that we, the people of Eastern Europe, can tell our own stories through the buildings, towns, and landscapes that shaped us. Over the next five years, we aim to map every significant monument and heritage-worthy building in the Central and Eastern European region, and to share the stories behind them — from the perspective of local communities.
At the heart of our foundation’s work lies the rich culture of our region: its many languages, its varied economies, its history of shifting borders, and its complex ethnic landscape. We believe that these layers of identity can be felt and understood most vividly through architecture. Buildings — whether homes, churches, castles, or public institutions — carry the memory of the past and the spirit of the people who built and used them.
This is why we consider the heritage-mapping project essential: it serves as the foundational encyclopedia of our region’s built heritage, a structured base for all future initiatives. It is fundamental work that brings clarity, connection, and visibility — and it enables us to preserve the beauty and diversity of Eastern Europe together.
Recommended buildings

St. Martin’s Cathedral in Bratislava
Bratislava’s first Catholic church under King Solomon was likely inside the castle, but at the request of King Emeric, Pope Innocent III in 1204 granted permission to the provost, and then Pope Honorius III in 1221 allowed the main church to move out from the castle.
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Primate’s Palace in Bratislava
The Primate’s Palace in Bratislava was built between 1778 and 1781, according to designs by the court architect Menyhért Hefele, commissioned and financed by József Batthyány.

Bratislava Castle
Dendrochronological examination of the wooden material from the ramparts of Bratislava Castle suggests that the trees used for the beams were felled in the 10th century.

Košice, St. Elizabeth’s Cathedral
More commonly known as the “Košice Cathedral,” it stands in the centre of the old town. There was already a Romanesque church on this site in the 13th century, but it burned down in 1378

The Alba Carolina - Citade Alba Iulia Fortress
Fehérvár, whose name also reflects the dignity title “gyula” of its builder, was constructed on the foundations – and partly from the stones – of a Roman castrum dating back to the 2nd century.

The Princely Palace (Palatul Principilor or Palatul Voievodal)
The episcopal palace of Gyulafehérvár, built in the 12th century, was transformed into a princely residence by John Sigismund.