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HTML 

              
                <head>
  <meta charset="utf-8">
  <meta name="author" content="pun-isher">
  
</head>
<body>
  <div class="container">
    <header class="page-header">
      <h1>Tribute to G. I. Gurdjieff</h1>
    </header>
    <div class="image-box">
    <img class="main-image" src="http://image3.redbull.com/rbma/0001/1/800/601/461/906/gurdjieff-feature-title.jpg"/>
    </div>
    <ul class="timeline">
      <li><div class="tldate">1912</div></li>
      <li>
        <div class="tl-circ"></div>
        <div class="timeline-panel">
          <div class="tl-heading">
            <h4>Gurdjieff Attracts First Followers</h4>
            <p><small class="text-muted"><i class="fa fa-cog"></i>January 1</small></p>
          </div>
          <div class="tl-body">
            <p>Upon returning to Moscow after a prolonged period of travelling abroard, Gurdjieff attracted his first students.</p>
          </div>
        </div>
      </li>
      <!-- SECOND ITEM -->
      <li><div class="tldate">1919</div></li>
      <li>
      <li class="timeline-inverted">
        <div class="tl-circ"></div>
        <div class="timeline-panel">
          <div class="tl-heading">
            <h4>Moving to Georgia (The Country)</h4>
            <p><small class="text-muted"><i class="fa fa-cog"></i>Unknown</small></p>
          </div>
          <div class="tl-body">
            <p>Gurdjieff and his closest pupils moved to Tifilis, Georgia. For a time, Gurdjieff worked on a ballet titled <em>The Struggle of the Magicians</em>, while he continued to take on more students.</p>
          </div>
        </div>
      </li>
      <li><div class="tldate">1921</div></li>
      <li>
      <li>
        <div class="tl-circ"></div>
        <div class="timeline-panel">
          <div class="tl-heading">
            <h4>The Institute for the Harmonious Development of Man</h4>
            <p><small class="text-muted"><i class="fa fa-cog"></i>Unknown</small></p>
          </div>
          <div class="tl-body">
            <p>After a time in Georgia and Turkey, Gurdjieff travelled to western Europe, giving demonstrations of his work in various cities. Upon a unsuccessful attempt to gain British citizenship, Gurdjieff established the <em>Institute for the Harmonious Development of Man</em> in Paris, France.</p>
          </div>
        </div>
      </li>
      <!-- Fourth Item -->
      <li><div class="tldate">1924</div></li>
      <li>
      <li class="timeline-inverted">
        <div class="tl-circ"></div>
        <div class="timeline-panel">
          <div class="tl-heading">
            <h4>All and Everything</h4>
            <p><small class="text-muted"><i class="fa fa-cog"></i>Unknown</small></p>
          </div>
          <div class="tl-body">
            <p>Gurdjieff began writing <a href="https://www.amazon.com/Beelzebubs-Tales-His-Grandson-Gurdjieff-ebook/dp/B0072I1IFE/ref=sr_1_1?ie=UTF8&qid=1497156938&sr=8-1&keywords=beelzebub%27s+tales" target="_blank"><em>Beelzebub's Tales</em></a>, the first part of the <em>All and Everything</em> series.</p>
          </div>
        </div>
      </li>
        <li><div class="tldate">1935</div></li>
      <li>
      <li>
        <div class="tl-circ"></div>
        <div class="timeline-panel">
          <div class="tl-heading">
            <h4>All and Some Things</h4>
            <p><small class="text-muted"><i class="fa fa-cog"></i>Unknown</small></p>
          </div>
          <div class="tl-body">
            <p>Gurdjieff stopped work on his <em>All and Everything</em> series. The first two parts of the trilogy were complete, but the third was not. The third part of the trilogy was later published under the title <em>Life Is Real Only Then, When 'I Am'.</em></p>
          </div>
        </div>
      </li>
      <!-- SIXTH ITEM -->
        <li><div class="tldate">1936</div></li>
      <li>
      <li class="timeline-inverted">
        <div class="tl-circ"></div>
        <div class="timeline-panel">
          <div class="tl-heading">
            <h4>Fading</h4>
            <p><small class="text-muted"><i class="fa fa-cog"></i>Unknown</small></p>
          </div>
          <div class="tl-body">
            <p>Gurdjieff taught during World War II in a flat at <em>6 Rue des Colonels-Renard</em>. At this point in his life, his teaching was far removed from the original system-- although his pupils were required to read <a href="https://www.amazon.com/Beelzebubs-Tales-His-Grandson-Gurdjieff-ebook/dp/B0072I1IFE/ref=sr_1_1?ie=UTF8&qid=1497156938&sr=8-1&keywords=beelzebub%27s+tales" target="_blank"><em>Beelzebub's Tales</em></a> three times. </p>
          </div>
        </div>
      </li>
  </div>
  <div class="row" style="height:50px; width:100%;background-color:white; margin: 0; border:0;padding:0;">
  </div>
    
   
  </body>
!

CSS 

              
                /*
The HTML and CSS styling for the timeline are based on a blog post published by Template Monster. This post can be viewed at https://www.templatemonster.com/blog/tutorial-build-vertical-timeline-archives-page-using-bootstrap/.

I want to thank Jake Rochelau for making this tutorial available, as it has taught me a lot about the potential of CSS, and introduced me to some new techniques. 

*/
body { background: #77c9d4;
       font-family:Georgia;}

img {boder: 0; max-width:50%;}

.page-header {
  text-align: center;
  color: #efefef;
  text-shadow: 1px 1px 0 #000;
}

h1 {
  font-size: 4em;
}

/** timeline box structure **/
.timeline {
  list-style: none;
  padding: 20px 0 20px;
  position: relative;
}

.timeline:before {
  top: 0;
  bottom: 0;
  position: absolute;
  content: " ";
  width: 3px;
  background-color: #eee;
  left: 50%;
  margin-left: -1.5px;
}

.tldate {
  display: block;
  width: 200px;
  background: #57bc90;
  border: 3px solid #015249;
  color: #ededed;
  margin: 0 auto;
  padding: 3px 0;
  font-weight: bold;
  text-align: center;
  -webkit-box-shadow: 0 0 11px rgba(0,0,0,0.35);
}

.timeline li {
  margin-bottom: 25px;
  position: relative;
}

.timeline li:before, .timeline li:after {
  content: " ";
  display: table;
}
.timeline li:after {
  clear: both;
}
.timeline li:before, .timeline li:after {
  content: " ";
  display: table;
}
/** timeline panels **/

.timeline li .timeline-panel {
  width: 46%;
  float: left;
  background: #fff;
  border: 1px solid #d4d4d4;
  padding: 20px;
  position: relative;
  -webkit-border-radius: 8px;
  -moz-border-radius: 8px;
  border-radius: 8px;
  -webkit-box-shadow: 0 1px 6px rgba(0,0,0,0.15);
  -moz-box-shadow: 0 1px 6px rgba(0,0,0,0.15);
  box-shadow: 0 1px 6px rgba(0,0,0,0.15);
}

/** timeline circle icons **/
.timeline li .tl-circ {
  position: absolute;
  top: 23px;
  left: 50%;
  text-align: center;
  background: #57bc90;
  color: #fff;
  width: 35px;
  height: 35px;
  line-height: 35px;
  margin-left: -16px;
  border: 3px solid #015249;
  border-top-right-radius: 50%;
  border-top-left-radius: 50%;
  border-bottom-right-radius: 50%;
  border-bottom-left-radius: 50%;
  z-index: 99999;
}


/** timeline content **/

.tl-heading h4 {
  margin: 0;
  color: #015249;
}

.tl-body p, .tl-body ul {
  margin-bottom: 0;
}

.tl-body > p + p {
  margin-top: 5px;
}

/** panel arrows **/
.timeline li .timeline-panel:before {
  position: absolute;
  top: 26px;
  right: -15px;
  display: inline-block;
  border-top: 15px solid transparent;
  border-left: 15px solid #ccc;
  border-right: 0 solid #ccc;
  border-bottom: 15px solid transparent;
  content: " ";
}

.timeline li .timeline-panel:after {
  position: absolute;
  top: 27px;
  right: -14px;
  display: inline-block;
  border-top: 14px solid transparent;
  border-left: 14px solid #fff;
  border-right: 0 solid #fff;
  border-bottom: 14px solid transparent;
  content: " ";
}

.timeline li .timeline-panel.noarrow:before, timeline li timeline-panel.noarrow {
  top: 0;
  right: 0;
  display: none;
  border: 0;
}

.timeline li.timeline-inverted .timeline-panel {
  float: right;
}

.timeline li.timeline-inverted .timeline-panel:before {
  border-left-width: 0;
  border-right-width: 15px;
  left: -15px;
  right: auto;
}

.timeline li.timeline-inverted .timeline-panel:after {
  border-left-width: 0;
  border-right-width: 14px;
  left: -14px;
  right: auto;
}
.image-box {
  height: 70%;
  width: 70%;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  resize: both;
  overflow: auto;
}

.main-image {
  border-radius: 10px;
  border: 3px solid white;
}

/** media queries **/
@media (max-width: 991px) {
  .timeline li .timeline-panel {
    width: 44%;
  }
}

@media (max-width: 700px) {
  .page-header 
  {font-size:1em;}
  
  ul.timeline:before {
    left: 40px;
  }
  
  .tldate {width: 140px;}
  
  ul.timeline li .timeline-panel {
    width: calc(100% - 90px);
    width: -moz-calc(100%- 90px);
    width: -webkit-calc(100%-90px);
  }
  
  ul.timeline li .tl-circ {
    top: 22px;
    left: 22px;
    margin-left: 0;
  }
  ul.timeline > li > .tldate {
    margin: 0;
  }
  ul.timeline > li > .timeline-panel {
    float: right;
  }
  ul.timeline > li > .timeline-panel:before {
    border-left-width: 0;
    border-right-width: 15px;
    left: -15px;
    right: auto; 
  }
  ul.timeline > li > .timeline-panel:after {
    border-left-width: 0;
    border-right-width:14px;
    left: -14px;
    right: auto; 
  }
  .image-box {
    max-width: 100%;
    max-height: 100%;
    justify-content: left;
    align-items: left;
    resize: both;
    overflow: auto;
    margin-left: 0;
    padding-left: 0;
  }
  .main-image {
    min-width: 200px;
  }
  .page-header {
    text-align: left;
  }
}
div > button {
  display: block;
  width: 100%;
}
!

JS
!
999px

Console