Complex sentence: She was a good candidate as a bride for the emperor already in 1673 because of her family's reputed great fertility and connections, and although Claudia Felicitas of Austria was chosen before her in 1674, she was chosen in 1676.
Split into simpler sentences: She was a good candidate as a bride for the emperor already in 1673 because of her family's reputed great fertility and connections. Although Claudia Felicitas of Austria was chosen before her in 1674, she was ultimately chosen in 1676.