diff --git a/IPython/html/static/widgets/js/widget_box.js b/IPython/html/static/widgets/js/widget_box.js
index e7850ce..f31f40b 100644
--- a/IPython/html/static/widgets/js/widget_box.js
+++ b/IPython/html/static/widgets/js/widget_box.js
@@ -146,224 +146,8 @@ define([
         },
     });
 
-    var PopupView = BoxView.extend({
-
-        render: function(){
-            /**
-             * Called when view is rendered.
-             */
-            var that = this;
-            
-            this.$el.on("remove", function(){
-                    that.$backdrop.remove();
-                });
-            this.$backdrop = $('<div />')
-                .appendTo($('#notebook-container'))
-                .addClass('modal-dialog')
-                .css('position', 'absolute')
-                .css('left', '0px')
-                .css('top', '0px');
-            this.$window = $('<div />')
-                .appendTo(this.$backdrop)
-                .addClass('modal-content widget-modal')
-                .mousedown(function(){
-                    that.bring_to_front();
-                });
-
-            // Set the elements array since the this.$window element is not child
-            // of this.$el and the parent widget manager or other widgets may
-            // need to know about all of the top-level widgets.  The IPython
-            // widget manager uses this to register the elements with the
-            // keyboard manager.
-            this.additional_elements = [this.$window];
-
-            this.$title_bar = $('<div />')
-                .addClass('popover-title')
-                .appendTo(this.$window)
-                .mousedown(function(){
-                    that.bring_to_front();
-                });
-            this.$close = $('<button />')
-                .addClass('close fa fa-remove')
-                .css('margin-left', '5px')
-                .appendTo(this.$title_bar)
-                .click(function(){
-                    that.hide();
-                    event.stopPropagation();
-                });
-            this.$minimize = $('<button />')
-                .addClass('close fa fa-arrow-down')
-                .appendTo(this.$title_bar)
-                .click(function(){
-                    that.popped_out = !that.popped_out;
-                    if (!that.popped_out) {
-                        that.$minimize
-                            .removeClass('fa-arrow-down')
-                            .addClass('fa-arrow-up');
-                            
-                        that.$window
-                            .draggable('destroy')
-                            .resizable('destroy')
-                            .removeClass('widget-modal modal-content')
-                            .addClass('docked-widget-modal')
-                            .detach()
-                            .insertBefore(that.$show_button);
-                        that.$show_button.hide();
-                        that.$close.hide();
-                    } else {
-                        that.$minimize
-                            .addClass('fa-arrow-down')
-                            .removeClass('fa-arrow-up');
-
-                        that.$window
-                            .removeClass('docked-widget-modal')
-                            .addClass('widget-modal modal-content')
-                            .detach()
-                            .appendTo(that.$backdrop)
-                            .draggable({handle: '.popover-title', snap: '#notebook, .modal', snapMode: 'both'})
-                            .resizable()
-                            .children('.ui-resizable-handle').show();
-                        that.show();
-                        that.$show_button.show();
-                        that.$close.show();
-                    }
-                    event.stopPropagation();
-                });
-            this.$title = $('<div />')
-                .addClass('widget-modal-title')
-                .html("&nbsp;")
-                .appendTo(this.$title_bar);     
-            this.$box = $('<div />')
-                .addClass('modal-body')
-                .addClass('widget-modal-body')
-                .addClass('widget-box')
-                .addClass('vbox')
-                .appendTo(this.$window);
-            
-            this.$show_button = $('<button />')
-                .html("&nbsp;")
-                .addClass('btn btn-info widget-modal-show')
-                .appendTo(this.$el)
-                .click(function(){
-                    that.show();
-                });
-            
-            this.$window.draggable({handle: '.popover-title', snap: '#notebook, .modal', snapMode: 'both'});
-            this.$window.resizable();
-            this.$window.on('resize', function(){
-                that.$box.outerHeight(that.$window.innerHeight() - that.$title_bar.outerHeight());
-            });
-
-            this._shown_once = false;
-            this.popped_out = true;
-
-            this.children_views.update(this.model.get('children'))
-        },
-        
-        hide: function() {
-            /**
-             * Called when the modal hide button is clicked.
-             */
-            this.$window.hide();
-            this.$show_button.removeClass('btn-info');
-        },
-        
-        show: function() {
-            /**
-             * Called when the modal show button is clicked.
-             */
-            this.$show_button.addClass('btn-info');
-            this.$window.show();
-            if (this.popped_out) {
-                this.$window.css("positon", "absolute");
-                this.$window.css("top", "0px");
-                this.$window.css("left", Math.max(0, (($('body').outerWidth() - this.$window.outerWidth()) / 2) + 
-                    $(window).scrollLeft()) + "px");
-                this.bring_to_front();
-            }
-        },
-        
-        bring_to_front: function() {
-            /**
-             * Make the modal top-most, z-ordered about the other modals.
-             */
-            var $widget_modals = $(".widget-modal");
-            var max_zindex = 0;
-            $widget_modals.each(function (index, el){
-                var zindex = parseInt($(el).css('z-index'));
-                if (!isNaN(zindex)) {
-                    max_zindex = Math.max(max_zindex, zindex);
-                }
-            });
-            
-            // Start z-index of widget modals at 2000
-            max_zindex = Math.max(max_zindex, 2000);
-            
-            $widget_modals.each(function (index, el){
-                $el = $(el);
-                if (max_zindex == parseInt($el.css('z-index'))) {
-                    $el.css('z-index', max_zindex - 1);
-                }
-            });
-            this.$window.css('z-index', max_zindex);
-        },
-        
-        update: function(){
-            /**
-             * Update the contents of this view
-             *
-             * Called when the model is changed.  The model may have been 
-             * changed by another view or by a state update from the back-end.
-             */
-            var description = this.model.get('description');
-            if (description.trim().length === 0) {
-                this.$title.html("&nbsp;"); // Preserve title height
-            } else {
-                this.typeset(this.$title, description);
-            }
-            
-            var button_text = this.model.get('button_text');
-            if (button_text.trim().length === 0) {
-                this.$show_button.html("&nbsp;"); // Preserve button height
-            } else {
-                this.$show_button.text(button_text);
-            }
-            
-            if (!this._shown_once) {
-                this._shown_once = true;
-                this.show();
-            }
-            
-            return PopupView.__super__.update.apply(this);
-        },
-        
-        _get_selector_element: function(selector) {
-            /**
-             * Get an element view a 'special' jquery selector.  (see widget.js)
-             *
-             * Since the modal actually isn't within the $el in the DOM, we need to extend
-             * the selector logic to allow the user to set css on the modal if need be.
-             * The convention used is:
-             * "modal" - select the modal div
-             * "modal [selector]" - select element(s) within the modal div.
-             * "[selector]" - select elements within $el
-             * "" - select the $el
-             */
-            if (selector.substring(0, 5) == 'modal') {
-                if (selector == 'modal') {
-                    return this.$window;
-                } else {
-                    return this.$window.find(selector.substring(6));
-                }
-            } else {
-                return PopupView.__super__._get_selector_element.apply(this, [selector]);
-            }
-        },
-    });
-
     return {
         'BoxView': BoxView,
-        'PopupView': PopupView,
         'FlexBoxView': FlexBoxView,
     };
 });
diff --git a/IPython/html/widgets/__init__.py b/IPython/html/widgets/__init__.py
index cb47420..0a5c7cc 100644
--- a/IPython/html/widgets/__init__.py
+++ b/IPython/html/widgets/__init__.py
@@ -2,7 +2,7 @@ from .widget import Widget, DOMWidget, CallbackDispatcher, register
 
 from .widget_bool import Checkbox, ToggleButton
 from .widget_button import Button
-from .widget_box import Box, Popup, FlexBox, HBox, VBox
+from .widget_box import Box, FlexBox, HBox, VBox
 from .widget_float import FloatText, BoundedFloatText, FloatSlider, FloatProgress, FloatRangeSlider
 from .widget_image import Image
 from .widget_int import IntText, BoundedIntText, IntSlider, IntProgress, IntRangeSlider
@@ -16,7 +16,7 @@ from .widget_link import Link, link, DirectionalLink, dlink
 # Deprecated classes
 from .widget_bool import CheckboxWidget, ToggleButtonWidget
 from .widget_button import ButtonWidget
-from .widget_box import ContainerWidget, PopupWidget
+from .widget_box import ContainerWidget
 from .widget_float import FloatTextWidget, BoundedFloatTextWidget, FloatSliderWidget, FloatProgressWidget
 from .widget_image import ImageWidget
 from .widget_int import IntTextWidget, BoundedIntTextWidget, IntSliderWidget, IntProgressWidget
diff --git a/IPython/html/widgets/widget_box.py b/IPython/html/widgets/widget_box.py
index ca9c626..555db22 100644
--- a/IPython/html/widgets/widget_box.py
+++ b/IPython/html/widgets/widget_box.py
@@ -45,15 +45,6 @@ class Box(DOMWidget):
             child._handle_displayed()
 
 
-@register('IPython.Popup')
-class Popup(Box):
-    """Displays multiple widgets in an in page popup div."""
-    _view_name = Unicode('PopupView', sync=True)
-    
-    description = Unicode(sync=True)
-    button_text = Unicode(sync=True)
-
-
 @register('IPython.FlexBox')
 class FlexBox(Box):
     """Displays multiple widgets using the flexible box model."""
@@ -87,5 +78,3 @@ def HBox(*pargs, **kwargs):
 
 # Remove in IPython 4.0
 ContainerWidget = DeprecatedClass(Box, 'ContainerWidget')
-PopupWidget = DeprecatedClass(Popup, 'PopupWidget')
-