diff --git a/changelog.txt b/changelog.txt
index 56aa6b584..b24a1ff32 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -31,6 +31,7 @@ Template for new versions:
 ## New Features
 - `gui/mass-remove`: added a button to the bottom toolbar when eraser mode is active for launching `gui/mass-remove`
 - `idle-crafting`: default to only considering happy and ecstatic units for the highest need threshold
+- `gui/sitemap`: added a button to the toolbar at the bottom left corner of the screen with the other menu buttons for launching `gui/sitemap`
 
 ## Fixes
 
diff --git a/docs/gui/sitemap.rst b/docs/gui/sitemap.rst
index ed1d89521..493f3ba5f 100644
--- a/docs/gui/sitemap.rst
+++ b/docs/gui/sitemap.rst
@@ -24,3 +24,16 @@ Usage
 ::
 
     gui/sitemap
+
+Overlay
+-------
+
+This tool also provides one overlay that is managed by the `overlay`
+framework.
+
+gui/sitemap.toolbar
+~~~~~~~~~~~~~~~~~~~
+
+The ``gui/sitemap.toolbar`` overlay adds a button to the toolbar at the bottom left corner of the
+screen with the other menu buttons. It allows you to conveniently open the ``gui/sitemap``
+interface.
diff --git a/gui/sitemap.lua b/gui/sitemap.lua
index 671212f91..ffc4082c5 100644
--- a/gui/sitemap.lua
+++ b/gui/sitemap.lua
@@ -3,6 +3,13 @@
 local gui = require('gui')
 local utils = require('utils')
 local widgets = require('gui.widgets')
+local overlay = require('plugins.overlay')
+
+local toolbar_textures = dfhack.textures.loadTileset('hack/data/art/sitemap_toolbar.png', 8, 12)
+
+function launch_sitemap()
+    dfhack.run_script('gui/sitemap')
+end
 
 --
 -- Sitemap
@@ -353,6 +360,87 @@ function SitemapScreen:onDismiss()
     view = nil
 end
 
+
+-- --------------------------------
+-- SitemapToolbarOverlay
+--
+
+SitemapToolbarOverlay = defclass(SitemapToolbarOverlay, overlay.OverlayWidget)
+SitemapToolbarOverlay.ATTRS{
+    desc='Adds a button to the toolbar at the bottom left corner of the screen for launching gui/sitemap.',
+    default_pos={x=35, y=-1},
+    default_enabled=true,
+    viewscreens='dwarfmode',
+    frame={w=28, h=9},
+}
+
+function SitemapToolbarOverlay:init()
+    local button_chars = {
+        {218, 196, 196, 191},
+        {179, '-', 'O', 179},
+        {192, 196, 196, 217},
+    }
+
+    self:addviews{
+        widgets.Panel{
+            frame={t=0, l=0, w=26, h=5},
+            frame_style=gui.FRAME_PANEL,
+            frame_background=gui.CLEAR_PEN,
+            frame_inset={l=1, r=1},
+            visible=function() return self.subviews.icon:getMousePos() end,
+            subviews={
+                widgets.Label{
+                    text={
+                        'Open the general search', NEWLINE,
+                        'interface.', NEWLINE,
+                        NEWLINE,
+                        {text='Hotkey: ', pen=COLOR_GRAY}, {key='CUSTOM_CTRL_G'},
+                    },
+                },
+            },
+        },
+        widgets.Panel{
+            view_id='icon',
+            frame={b=0, l=0, w=4, h=3},
+            subviews={
+                widgets.Label{
+                    text=widgets.makeButtonLabelText{
+                        chars=button_chars,
+                        pens=COLOR_GRAY,
+                        tileset=toolbar_textures,
+                        tileset_offset=1,
+                        tileset_stride=8,
+                    },
+                    on_click=launch_sitemap,
+                    visible=function () return not self.subviews.icon:getMousePos() end,
+                },
+                widgets.Label{
+                    text=widgets.makeButtonLabelText{
+                        chars=button_chars,
+                        pens={
+                            {COLOR_WHITE, COLOR_WHITE, COLOR_WHITE, COLOR_WHITE},
+                            {COLOR_WHITE, COLOR_GRAY,  COLOR_GRAY,  COLOR_WHITE},
+                            {COLOR_WHITE, COLOR_WHITE, COLOR_WHITE, COLOR_WHITE},
+                        },
+                        tileset=toolbar_textures,
+                        tileset_offset=5,
+                        tileset_stride=8,
+                    },
+                    on_click=launch_sitemap,
+                    visible=function() return not not self.subviews.icon:getMousePos() end,
+                },
+            },
+        },
+    }
+end
+
+function SitemapToolbarOverlay:onInput(keys)
+    return SitemapToolbarOverlay.super.onInput(self, keys)
+end
+
+OVERLAY_WIDGETS = {toolbar=SitemapToolbarOverlay}
+
+
 if dfhack_flags.module then
     return
 end