Complex sentence: However, the demolition seemed to be a mistake since some its facilities remained in good condition and can be refurbished for the votive festivals celebrated by the Cathedral for Our Lady of La Leche.
Split into simpler sentences: However, the demolition seemed to be a mistake, since some its facilities remained in good condition. The facilities that are still in good condition can be refurbished for the votive festivals celebrated by the Cathedral for Our Lady of La Leche.