diff --git a/gitlab-pages/docs/reference/big_map.md b/gitlab-pages/docs/reference/big_map.md
new file mode 100644
index 000000000..4dd6ba3af
--- /dev/null
+++ b/gitlab-pages/docs/reference/big_map.md
@@ -0,0 +1,268 @@
+---
+id: big-map-reference
+title: Big Map
+---
+
+## Defining A Big Map Type
+
+<!--DOCUSAURUS_CODE_TABS-->
+<!--Pascaligo-->
+```pascaligo
+type move is (int * int)
+type moveset is big_map (address, move)
+type foo is big_map (int, int)
+```
+
+<!--CameLIGO-->
+```cameligo
+type move = int * int
+type moveset = (address, move) big_map
+type foo = (int, int) big_map
+```
+
+<!--ReasonLIGO-->
+```reasonligo
+type move = (int, int);
+type moveset = big_map(address, move);
+type foo = big_map(int, int);
+```
+
+<!--END_DOCUSAURUS_CODE_TABS-->
+
+## Creating A Map
+
+<!--DOCUSAURUS_CODE_TABS-->
+<!--Pascaligo-->
+
+```pascaligo
+const moves: moveset =
+  big_map
+    ("tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx": address) -> (1,2);
+    ("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address) -> (0,3);
+  end
+```
+
+<!--CameLIGO-->
+
+```cameligo
+let moves: moveset =
+  Big_map.literal [
+    (("tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx": address), (1,2));
+    (("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address), (0,3));
+  ]
+```
+
+<!--ReasonLIGO-->
+
+```reasonligo
+let moves: moveset =
+  Big_map.literal ([
+    ("tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx": address, (1,2)),
+    ("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address, (0,3)),
+  ]);
+```
+
+<!--END_DOCUSAURUS_CODE_TABS-->
+
+## Big_map.find_opt(k: a', m: (a',b') big_map) : b' option
+
+Retrieve the value associated with a particular key. This version returns an option
+which can either shift logic in response to a missing value or throw an error.
+
+<!--DOCUSAURUS_CODE_TABS-->
+<!--Pascaligo-->
+```pascaligo
+const my_balance : option(move) =
+  moves [("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address)]
+```
+
+<!--CameLIGO-->
+
+```cameligo
+let my_balance : move option =
+  Big_map.find_opt ("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address) moves
+```
+
+<!--ReasonLIGO-->
+
+```reasonligo
+let my_balance : option(move) =
+  Big_map.find_opt("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address, moves);
+```
+<!--END_DOCUSAURUS_CODE_TABS-->
+
+## Big_map.find(k: a', m: (a', b') big_map) : b'
+
+Forcefully retrieve the value associated with a particular key. If that value
+doesn't exist, this function throws an error.
+
+<!--DOCUSAURUS_CODE_TABS-->
+<!--Pascaligo-->
+```pascaligo
+const my_balance : move =
+  get_force (("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address), moves);
+```
+
+<!--CameLIGO-->
+
+```cameligo
+let my_balance : move =
+  Big_map.find ("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address) moves
+```
+
+<!--ReasonLIGO-->
+
+```reasonligo
+let my_balance : move =
+  Big_map.find ("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address, moves);
+```
+
+<!--END_DOCUSAURUS_CODE_TABS-->
+
+## Big_map.update(k: a', v: b', m: (a', b') big_map) : (a', b') big_map
+
+Change the value associated with a particular key, if that value doesn't already
+exist add it.
+
+<!--DOCUSAURUS_CODE_TABS-->
+
+<!--Pascaligo-->
+
+The values of a PascaLIGO big map can be updated using the ordinary
+assignment syntax:
+
+```pascaligo
+
+function set_ (var m : moveset) : moveset is
+  block {
+    m [("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address)] := (4,9);
+  } with m
+```
+
+<!--Cameligo-->
+
+```cameligo
+let updated_map : moveset =
+  Big_map.update ("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address) (Some (4,9)) moves
+```
+
+<!--Reasonligo-->
+
+```reasonligo
+let updated_map : moveset =
+  Big_map.update(("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address), Some((4,9)), moves);
+```
+
+<!--END_DOCUSAURUS_CODE_TABS-->
+
+## Big_map.add(k: a', v: b', m: (a', b') big_map) : (a', b') big_map
+
+Add a key and its associated value to the big map.
+
+<!--DOCUSAURUS_CODE_TABS-->
+
+<!--PascaLIGO-->
+```pascaligo
+function set_ (var n : int ; var m : foo) : foo is block {
+  m[23] := n ;
+} with m
+```
+
+<!--CameLIGO-->
+```cameligo
+let add (n,m : int * foo) : foo = Big_map.add 23 n m
+```
+
+<!--ReasonLIGO-->
+```reasonligo
+let add = ((n,m): (int, foo)): foo => Big_map.add(23, n, m);
+```
+
+<!--END_DOCUSAURUS_CODE_TABS-->
+
+## Big_map.remove(k: a', m: (a', b') big_map) : (a', b') big_map
+
+Remove a key and its associated value from the big map.
+
+<!--DOCUSAURUS_CODE_TABS-->
+
+<!--PascaLIGO-->
+```pascaligo
+function rm (var m : foo) : foo is block {
+  remove 42 from map m;
+} with m
+```
+
+<!--CameLIGO-->
+```cameligo
+let rm (m : foo) : foo = Big_map.remove 42 m
+```
+
+<!--ReasonLIGO-->
+```reasonligo
+let rm = (m: foo): foo => Big_map.remove(42, m);
+```
+
+<!--END_DOCUSAURUS_CODE_TABS-->
+
+## Big_map.literal(key_value_pair_list: (a', b') list) : (a', b') big_map
+
+Constructs a big map from a list of key-value pair tuples.
+
+<!--DOCUSAURUS_CODE_TABS-->
+<!--Pascaligo-->
+
+```pascaligo
+const moves: moveset =
+  big_map
+    ("tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx": address) -> (1,2);
+    ("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address) -> (0,3);
+  end
+```
+
+<!--CameLIGO-->
+
+```cameligo
+let moves: moveset =
+  Big_map.literal [
+    (("tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx": address), (1,2));
+    (("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address), (0,3));
+  ]
+```
+
+<!--ReasonLIGO-->
+
+```reasonligo
+let moves: moveset =
+  Big_map.literal ([
+    ("tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx": address, (1,2)),
+    ("tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN": address, (0,3)),
+  ]);
+```
+
+<!--END_DOCUSAURUS_CODE_TABS-->
+
+
+## Big_map.empty() : (a', b') big_map
+
+Create an empty big map.
+
+<!--DOCUSAURUS_CODE_TABS-->
+
+<!--PascaLIGO-->
+```pascaligo
+const empty_big_map : big_map(int,int) = big_map end
+```
+
+<!--CameLIGO-->
+```cameligo
+let empty_map : foo = Big_map.empty
+```
+
+<!--ReasonLIGO-->
+```reasonligo
+let empty_map: foo = Big_map.empty;
+```
+
+<!--END_DOCUSAURUS_CODE_TABS-->
+
diff --git a/src/test/contracts/big_map.ligo b/src/test/contracts/big_map.ligo
index 1a6dcfab0..9b8364ac3 100644
--- a/src/test/contracts/big_map.ligo
+++ b/src/test/contracts/big_map.ligo
@@ -16,6 +16,8 @@ function set_ (var n : int; var m : foo) : foo is block {
   m[23] := n
 } with m
 
+function add (var n : int ; var m : foo) : foo is set_(n,m)
+
 function rm (var m : foo) : foo is block {
   remove 42 from map m
 } with m
diff --git a/src/test/contracts/big_map.mligo b/src/test/contracts/big_map.mligo
index eb06bd5f4..35a173f82 100644
--- a/src/test/contracts/big_map.mligo
+++ b/src/test/contracts/big_map.mligo
@@ -1,8 +1,8 @@
 type foo = (int, int) big_map
 
-let set_2 (n : int) (m : foo) : foo = Big_map.update 23 (Some n) m
+let set_ (n, m: int * foo) : foo = Big_map.update 23 (Some n) m
 
-let set_ (t: int * foo) : foo = set_2 t.0 t.1
+let add (n,m : int * foo) : foo = Big_map.add 23 n m
 
 let rm (m : foo) : foo = Big_map.remove 42 m
 
diff --git a/src/test/contracts/big_map.religo b/src/test/contracts/big_map.religo
index 03b13b404..92f5431c8 100644
--- a/src/test/contracts/big_map.religo
+++ b/src/test/contracts/big_map.religo
@@ -4,6 +4,8 @@ let set2 = (n: int, m: foo): foo => Big_map.update(23, Some(n), m);
 
 let set_ = (x: (int, foo)): foo => set2(x[0], x[1]);
 
+let add = ((n,m): (int, foo)): foo => Big_map.add(23, n, m);
+
 let rm = (m: foo): foo => Big_map.remove(42, m);
 
 let gf = (m: foo): int => Big_map.find(23, m);
diff --git a/src/test/integration_tests.ml b/src/test/integration_tests.ml
index dac0564d2..f384db470 100644
--- a/src/test/integration_tests.ml
+++ b/src/test/integration_tests.ml
@@ -1079,6 +1079,11 @@ let big_map_ type_f path : unit result =
     let make_expected = fun n -> ez [(23 , n) ; (42 , 0)] in
     expect_eq_n_pos_small program "set_" make_input make_expected
   in
+  let%bind () =
+    let input = (e_pair (e_int 23) (ez [(42, 42)])) in
+    let expected = ez [(23, 23) ; (42, 42)] in
+    expect_eq program "add" input expected
+  in
   let%bind () =
     let make_input = fun n -> ez [(23, n) ; (42, 4)] in
     let make_expected = fun _ -> e_some @@ e_int 4 in
diff --git a/src/test/md_file_tests.ml b/src/test/md_file_tests.ml
index f697a18d4..247f396f1 100644
--- a/src/test/md_file_tests.ml
+++ b/src/test/md_file_tests.ml
@@ -122,6 +122,7 @@ let md_files = [
   "/gitlab-pages/docs/advanced/timestamps-addresses.md";
   "/gitlab-pages/docs/api/cli-commands.md";
   "/gitlab-pages/docs/api/cheat-sheet.md";
+  "/gitlab-pages/docs/reference/big_map.md";
   "/gitlab-pages/docs/reference/string.md";
 ]