The austerely sculpted porches flanking the main entrance are from the early period, and the more ornamental elongated central porch and the gabled upper windows were added in the 15th and 16th centuries.
Everything was built at the same time and remained the same throughout its history.
mnli hypothesis: Everything was built at the same time and remained the same throughout its history. premise: The austerely sculpted porches flanking the main entrance are from the early period, and the more ornamental elongated central porch and the gabled upper windows were added in the 15th and 16th centuries.