Maria Siklos remembers well what the banks of the Danube used to look like: “It was totally run down and terrible. There were warehouses and empty lots. But the area itself was beautiful.” Shortly after the turn of the millennium, the National Theatre (Nemzeti Színház) was built to the designs of the 83-year-old architect. It was the dawn of a new age in Budapest, which Siklos helped usher in. Since then, the cranes haven’t stood still and Hungary’s capital has been in constant transformation. The most recent prestigious projects are located in the city park (Városliget) not far from the Easte…