Between 1180 and 1220 the French king Philip Augustus built the castle
of the Louvre as part of a massive city wall. (Parts of the wall can still
be seen in the Marais district behind the Hotel de Sens and near the
Church of St.-Etienne-du-Monte.) The castle of the Louvre was a secure
place to house the royal treasure and archives. The great tower—a round
central tower—was over one hundred feet high and sixty feet in diameter,
with walls twelve to thirteen feet thick. (Today the base of the tower
forms part of the underground entrance to the Louvre Museum.) The
tower stood in a rectangular court, surrounded by curtain walls with corner
towers. Towered gates opened in the center of the south and east
walls. In the fourteenth century Charles V added more residential accommodations,
and in 1527 Francis I destroyed the medieval towers and
walls to build a Renaissance royal palace and gardens.