It is believed the Temple Chapel in Metz, rare in Lorraine for it octagonal design, was built about 1180 with additional reconstruction work in 1220, and the surrounding Templar structures destroyed following the dissolution of the order following the Friday 13th arrest of Templars by the agents of King Phillip IV in 1307. The small and relatively simple building is an elegant masterpiece of medieval architecture, one of the few remaining rotunda forms popular with the Templers. The external thick walls and narrow windows reflect the original Romanesque period construction while the interior high arched gothic ribbed roof with ceiling and wall frescoes are from the 13th Century additions, though much of the paintings seen are from a 1905 restoration.  This by far is one of my favourite places so far – Templars are just cool!