Complex sentence: The St. Francis Chapel houses four large original stained-glass windows and two original mosaics by Tiffany, and the Mexican Baroque Rayas Altar, 25 feet tall, 16 feet across, carved from cedar and covered in gold leaf.
Split into simpler sentences: The St. Francis Chapel houses four large, stained-glass windows and two mosaics by Tiffany. The Mexican Baroque Rayas Altar is 25 feet tall by 16 feet across, carved from cedar and covered in gold leaf.