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+=============
+``pie_chart``
+=============
+
+.. image:: img/smaller/pie-chart.png
+
+**Description**
+
+"Pie-chart" style chart using `jqPlot <http://www.jqplot.com/>`_ library, with
+optional legend.
+
+**Content**
+
+::
+
+  data = {
+      "title": "<optional_title>",
+      "pie_data": [[identifier1, value1], [identifier2, value2], ...]
+  }
+
+where:
+
+.. describe:: title
+
+   Chart's title (optional).
+
+.. describe:: pie_data
+
+   Data for pie-chart in a form of list of lists, where each sub-list is an
+   identifier-value pair. Percentage of the whole chart shared by given part is
+   calculated automatically by jqPlot - relatively to the sum of values of all
+   parts.
+
+Example::
+
+  curl http//localhost:7272/api/v0.1/<api_key>/push
+       -X POST
+       -d "tile=pie_chart"
+       -d "key=example_pie"
+       -d 'data={"title": "My title", "pie_data": [["Pie 1", 25], ["Pie 2", 25], ["Pie 3", 50]]}'
+
+-- this will result in a pie-chart with title "My title", divided by three
+parts "Pie 1", "Pie 2" and "Pie 3".
+
+**Configuration**
+
+::
+
+  value = {<jqplot_config>}
+
+where:
+
+.. describe:: jqplot_config
+
+   Configuration params in the form described by `jqPlot documentation
+   <http://www.jqplot.com/tests/pie-donut-charts.php>`_.
+
+Example::
+
+    curl http://localhost:7272/api/v0.1/<api_key>/tileconfig/<tild_id>
+         -X POST
+         -d 'value={"title": true, "legend": {"show": true, "location": "s"}}'
+
+-- this will result in a pie-chart with legend turned on at the bottom of the tile (``s`` stands for "south") - its title will be turned on as well.