The young Princess's first cousin, Prince George (later King George V), proposed to her when she was seventeen, but her mother refused to let her marry him, finding for her instead the somewhat boring Prince Ferdinand, heir to the throne of Romania.
A few years later, in 1926, as her husband's health declined, Marie began work on a garden and "palace" there, to be the seaside residence of the court. It's a small, understated building to be called a palace, but it's pretty and comfortable and quirky, which is exactly what the queen had wanted (her mountain "palace" in the Carpathians was a treehouse). On one side is a church, on the other a minaret (Marie had begun following the Bahá'í faith, which recognizes all religions as one), beside it is a watermill, in front is the sea.
Marie showed up to the signing of the Treaty of Versailles uninvited, to represent Romania against her husband's wishes. While there, she negotiated for Besserabia to be added to her crown lands, which more than doubled Romania's pre-war population and made her a heroine. In the process, she also shocked Woodrow Wilson with frank discussions about sex - she showed him a photograph of her "love child," and explained to the president why this daughter was darker-skinned than her other children.
Not much more than two years later, though, Bulgaria gained control of this part of the coast. Though the new proprietors promised to take good care of Marie's heart and the chapel, the Romanians decided that they wanted to have their queen's organ remain in Romanian soil, so they reburied it in the Transylvanian alps. Unfortunately, not long after this, the new communist government dug the sarcophagus up again and put it in storage, where it's mostly remained - it's now scheduled to be part of a temporary exhibition at a museum in Bran. It's sad - I'm sure the Queen wouldn't have cared who controlled Balchik. After all, it's still her place.