Mounted high on the walls, the visible security cameras sent a clear message to visitors: We see you. Do not touch anything.
"Any of them real?" Langdon asked, motioning to the cameras.
Fache shook his head. "Of course not."
Langdon was not surprised. Video surveillance in museums this size was cost-prohibitive and ineffective. With acres of galleries to watch over, the Louvre would require several hundred technicians simply to monitor the feeds. Most large museums now used "containment security." Forget keeping thieves out. Keep them in. Containment was activated after hours, and if an intruder removed a piece of artwork, compartmentalized exits would seal around that gallery, and the thief would find himself behind bars even before the police arrived.
The sound of voices echoed down the marble corridor up ahead. The noise seemed to be coming from a large recessed alcove that lay ahead on the right. A bright light spilled out into the hallway.
"Office of the curator," the captain said.
As he and Fache drew nearer the alcove, Langdon peered down a short hallway, into Saunière's luxurious study—warm wood, Old Master paintings, and an enormous antique desk on which stood a two-foot-tall model of a knight in full armor. A handful of police agents bustled about the room, talking on phones and taking notes. One of them was seated at Saunière's desk, typing into a laptop. Apparently, the curator's private office had become DCPJ's makeshift command post for the evening.
cost-prohibitive 成本高昂的（prohibitive有费用过高的意思）
containment 控制
intruder 入侵者
recessed 嵌壁式的
alcove 壁龛
study 书房
makeshift 临时的
高高安置在墙上的安全摄像机赫然可见，它向游客清楚地传达这样的信息：我们看着你呢，别动手触摸任何东西。
"有真的吗？"兰登边问边指向摄像机。
法希摇头说："当然没有。" 兰登一点也不觉得奇怪。在这么大的美术馆实施录像监视，成本太高，很难做到，而且效果也不好。要监视这数公顷的画廊，单负责信息传输的技术人员，整个卢浮宫就得要好几百人。大多数大型的博物馆现在都使用一种叫"封闭保护"的防范措施。别想着不让贼进来，要让他们出不去。封闭装置在闭馆后启动。如果侵入者拿走一件艺术品，自动封闭的出口就会将画廊封死，即便在警察没赶来之前，贼就已被挡在栅栏里面出不去了。
声音在上面的大理石走廊内回响。嘈杂声好像是从右前方隐蔽处的小房间里传出来的。那里有一束亮光倾泻在走廊里。
"馆长办公室。"局长说。
和法希走近那个小室后，顺着一条又低又短的走廊望去，兰登能看到索尼埃豪华的书房--暖色木材的家具，从前的大师们的画作，还有一个巨大的古色古香的写字台，写字台上立着个两英尺高的全身铠甲的武士模型。房间里几个警察正在忙忙碌着，其中一个坐在索尼埃的桌子前正往手提电脑里输入东西。显然，馆长的私人办公室已成了中央司法警察今晚的临时指挥部了。
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