Complex sentence: The term Temple Bar is also applied to the gateway designed by Christopher Wren occupying the spot from the 17th to the late 19th century, which has been preserved and is now located in Paternoster Square next to St Paul's Cathedral.
Split into simpler sentences: The term Temple Bar is also retained for the gateway designed by Christopher Wren which used to occupy the spot from the 17th to the late 19th century. Wren's arch has been preserved and is now located in Paternoster Square next to St Paul's Cathedral.