1843, she gave birth to a son, Nicholas. Two more sons, Alexander and Vladimir, were born in 1845 and 1847. Shortly after having her third son, her health began to fail and she had to go to Bad Kissingen in Bavaria to recuperate. To mark each birth, Alexander and Maria planted oak trees in their private garden at Tsarskoye Selo, where skittles, swings and slides were provided for the children. Indoors, she played the piano and created tapestries with her family. In July 1849, both parents were devastated when their daughter Alexandra died from infant meningitis at the age of six and a half. Grief-stricken by her loss, Maria had to go to the sea town of Revel in Estonia to recuperate. Even many years later, she would still cry over the death of her eldest child. In January 1850, she gave birth to a fourth son, Grand Duke Alexei. During her first decade in Russia, Maria Alexandrovna enjoyed the company and support of her brother Alexander, who had accompanied her to Russia to follow a military career there. In 1851, he contracted a morganatic marriage with Julia von Hauke, one of his sister's ladies-in-waiting. As a consequence, he fell from grace and had to resign his Russian commission. He left the country, returning to Heiligenberg, the siblings' childhood home. In October 1853, Maria had a much-awaited second daughter, Grand Duchess Maria Alexandrovna. Empress On 18 February 1855, Nicholas I died of pneumonia and was succeeded by Alexander to the Russian throne as Tsar. It was a turbulent period as Russian troops were being defeated by an international coalition in the Crimean War. After a siege lasting eleven months, Sevastopol fell in September 1855. With a prospect of invasion from the west if the war continued, Russia sued for peace in March 1856 in Paris. The humiliation of defeat was left behind by the coronation festivities that were held with Byzantine splendor from 14 to 26 August 1856. The coronation ceremony lasted five hours took place at the Assumption Cathedral of Moscow Kremlin on . When four court ladies tried to fix the crown to the 30-years-old Empress's head it nearly clattered to the ground, saved only by the fold of her cloak, a bad omen by the time. Nine months after the coronation, Maria Alexandrovna gave birth to a fifth son, Sergei, in April 1857. Suffering from depression, she