diff --git a/components/DiagramLegend.jsx b/components/DiagramLegend.jsx
new file mode 100644
index 0000000..935beb9
--- /dev/null
+++ b/components/DiagramLegend.jsx
@@ -0,0 +1,48 @@
+import * as d3 from 'd3';
+import React from 'react';
+
+class DiagramLegend extends React.Component {
+
+	componentDidMount() {
+        this.root = d3.select(`svg#${this.props.id}`)
+
+        let groupYCoord = 0
+        this.props.legendData.forEach((legendData)=>{
+            let group = this.root.append('g');
+                group.attr('transform', `translate(0, ${groupYCoord})`)
+                    .append('rect')
+                    .attr('style', `fontSize: 15px; stroke-width: 1; stroke: #808080; fill: ${legendData.fillColor}; `)
+                    .attr('width', 15)
+                    .attr('height', 15)
+                    .attr('x', 0)
+                    .attr('y', 0)
+                    .attr('r', 6)
+
+                group.append('text')
+                    .text(legendData.label)
+                    .attr('alignment-baseline', 'middle')
+                    .attr('x', 25)
+                    .attr('y', 8.5)
+                if(legendData.marker){
+                    group.append('text')
+                        .text(legendData.marker)
+                        .attr('style', `fontSize: 15px; fill: ${legendData.markerFillColor}; `)
+                        .attr('x', 2.5)
+                        .attr('y', 12.5)
+                        // console.log("Marker exists for ", legendData.label );
+                }
+
+            groupYCoord+=25;
+        })
+
+	}
+
+	render() {
+		return (
+            <svg style={{...this.props.style}} id={this.props.id}></svg>
+		)
+	}
+}
+
+
+export default DiagramLegend;
\ No newline at end of file
diff --git a/pages/spatial-pooling.jsx b/pages/spatial-pooling.jsx
index c5fd98a..c317c15 100644
--- a/pages/spatial-pooling.jsx
+++ b/pages/spatial-pooling.jsx
@@ -29,6 +29,34 @@ import CompetitionStackRank from '../components/diagrams/CompetitionStackRank'
 import StreamingScalarDiagram from '../components/diagrams/StreamingScalarDiagram'
 // import DiagramStub from '../components/diagrams/DiagramStub'
 
+//Legends
+import PotentialPoolsLegend from '../components/DiagramLegend';
+let legendData = [
+    {
+        fillColor: '#FFF0A6',
+        label: 'Potential Pool',
+        marker: ''
+    },
+    {
+        fillColor: '#fff',
+        label: 'Feed Forward Input',
+        marker: ''
+    },
+    {
+        fillColor: '#BFBFBF',
+        label: 'Ignored Input',
+        marker: '✘',
+        markerFillColor: 'white'
+
+    },
+    {
+        fillColor: '#FFF0A6',
+        label: 'Observed Input',
+        marker: '✓',
+        markerFillColor: 'green'
+    },
+]
+
 var days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
 
 const { BoundedScalarEncoder, CyclicEncoder, DayOfWeekCategoryEncoder, WeekendEncoder } = simplehtm.encoders
@@ -430,6 +458,10 @@ class SpatialPooling extends React.Component {
 							selectedMinicolumn={this.state.selectedMinicolumn}
 							onUpdate={selectedMinicolumn => this.setState({ selectedMinicolumn })}
 						/>
+						<PotentialPoolsLegend
+							style={{marginLeft: diagramWidth / 2}}
+							legendData={legendData}
+							id="potentialPoolLegend"/>
 						<figcaption className="figure-caption">
 							<span><a href="#potentialPools">¶</a>Figure 2:</span> Potential Pools.
 						</figcaption>