Complex sentence: As early as 1545 an orangery was built in Padua, Italy.The first orangeries were not as well thought-out or as ornate as our modern versions; most had no heating and in the very cold nights had to have open fires to keep them warm.
Split into simpler sentences: As early as 1545 an orangery was built in Padua, Italy. Most had no heating and in the very cold nights had to have open fires to keep them warm.