Complex sentence: In 1904, Olga was created Countess von Hohenfelsen by HRH Prince Luitpold of Bavaria (the regent), making Vladimir Count Vladimir von Hohenfelsen, and in 1915 she was created Her Serene Highness Princess Paley by Nicholas II, making Vladimir a Prince.
Split into simpler sentences: In 1904, Olga was created Countess von Hohenfelsen by Prince Regent Luitpold of Bavaria, making Vladimir Count Vladimir von Hohenfelsen. In 1915 Olga was created Her Serene Highness Princess Paley by Nicholas II, making Vladimir a Prince.