Complex sentence: The exact date of the initial construction is not recorded, however, in the period between 1299 and 1301 a one story structure with cellars and a tower, called the consistory, was built.
Split into simpler sentences: The exact date of the initial construction is not recorded. However, in the period between 1299 and 1301, the consistory, a one story structure with cellars and a tower, was built.