The Medieval Ruin Garden (Romkert), at the heart of the old town, is the most important site in Székesfehérvár. The footprint of the great royal basilica is laid out under the open sky, with the surviving foundations, column bases, and a few intact stretches of crypt wall preserved as an archaeological park. A small mausoleum at the centre, built in the 1930s in a stripped-down classical style, marks the spot of King Stephen I's tomb.
It's a curious place to visit because almost nothing rises above waist height — the walls are gone, the columns are gone, the roof is gone — but the scale is clear, and the explanatory plaques (in Hungarian, German, and English) make it possible to picture what stood here. A small museum on the edge of the site displays the most important finds, including fragments of royal sarcophagi.