October 26th 1915 was a fateful day for Vienna's leading architect and city planner. It was the day his wife Louise, 18 years his junior, died of cancer. Wagner had started to keep a diary when Louise was first diagnosed and continued to regularly record his memories of better days and comments on current developments. He intended the diary to be a memorial to is unparalleled love for Louise, yet it also reveals the misanthropic despair of a great artist. He considered himself to be at the peak of his craft and felt a Habsburg victory was close, bringing fresh opportunities to realise his plans. But old age afflictions and the miseries of WW1 took a growing toll on his day-to-day life. Rampant anti-Semitism, suffering and paranoia increasingly defined his thoughts. Three years on, the death of this patriarch coincided with the end of the Habsburg empire.