body {text-align: center;
      margin: 0%;
      padding: 0%;
      }

#Titel {border-style: solid;
        border-color: grey;
        border-width: thin;
        background-color: silver;
        height: 38px;
        width: 1004px;
        font-size: xx-large
        }

#Navigation {border-style: solid;
             border-color: grey;
             border-width: thin;
             height: 900px;
             width: 170px;
             float: left;
             font-size: large;
             color: yellow;
             text-decoration: underline;
             }


#Hauptseite {border-style: solid;
             border-color: grey;
             border-width: thin;
             background-color: silver;
             height: 900px;
             width:1004px;
             }

.Roland_Rosenfeld {margin: 30px;}
.lost-jacob2 {margin: 11px;}
.Jacob {margin: 30px;}
.six-degrees-of-separation { margin: 30px;}
.Orientation { margin: 30px;}