ブラウンシュヴァイク＝リューネブルク
The lion and the heart were part of the arms of the Lüneburg, a subdivision of the Duchy of Brunswick-Lüneburg. The Principality was occasionally (but incorrectly) also known as Brunswick-Celle, since Celle was its capital for some time. The only difference is the number of hearts (the original coat of arms included more than one heart).