Tak jak w pytaniu.
<!DOCTYPE HTML>
<html lang="pl">
<head>
<meta charset="utf-8" />
<title>str</title>
<meta name="description" content=" bbbbbbb"/>
<meta name="keywords" content="bablal"/>
<meta http-equiv="X-UA-COMPATIBLE" content="IE=edge.chrome=1"/>
<link rel="stylesheet" href="new.css" type="text/css"/>
<link href="https://fonts.googleapis.com/css?family=Oxygen:300,400&subset=latin-ext" rel="stylesheet">
</head>
<body background="photo/ik.png">
<div id="container">
<div id="Logo">
<img src="photo/logo.png" width="800" height="533.5">
</div>
</div>
</body>
</html>
*{
margin:0;
padding:0;
box-sizing: border-box;
background-attachment: fixed;
background-size:100%;
}
#container
{
width:1000px;
margin: 0 auto;
}
#logo
{
text-align: center;
}