Complex sentence: Built entirely to her own design, Alfvéngaard can be considered Marie Krøyer's masterpiece, especially as she also created the furniture and interiors, and she designed a number of beautiful little buildings in the local style around the estate.
Split into simpler sentences: Built entirely to her own design, Alfvéngaard can be considered Marie Krøyer's masterpiece, especially as she also created the furniture and interiors. She also designed a number of beautiful little buildings in the local style around the estate.