This is the 5929th most frequent German word.
callas
"Callas" is not a standard German word; it may refer to the soprano Maria Callas or be a non-German term.
In this sentence, 'Callas' refers to the name given to the specific type of flowers (calla lilies).
Ich habe gestern ein schönes Bild von Callas Blumen gesehen.
I saw a beautiful picture of callas flowers yesterday.
Here, 'Callas' refers to a proper noun, the last name of Maria Callas.
Maria Callas war eine der berühmtesten Opernsängerinnen ihrer Zeit.
Maria Callas was one of the most famous opera singers of her time.
The word 'Calla' refers to a singular form naming the type of flower, used as a noun in botany.