Think mirror.

Mirrored swastika

The sauwastika was a favorite symbol of the last Russian Empress Alexandra Feodorovna. She put this sign everywhere for good luck. In particular, she drew it with a pencil on the wall, at the window opening, and on the wallpaper above the bed of her son Tsarevich Alexei Nikolaevich in Ipatiev House, where the murdered Emperor's family spent the last days of their lives.