diff --git a/masque/label.py b/masque/label.py
index 6a2a61f..98a65df 100644
--- a/masque/label.py
+++ b/masque/label.py
@@ -53,6 +53,22 @@ class Label(PositionableImpl, RepeatableImpl, AnnotatableImpl, Bounded, Pivotabl
         self.repetition = repetition
         self.annotations = annotations if annotations is not None else {}
 
+    @classmethod
+    def _from_raw(
+            cls,
+            string: str,
+            *,
+            offset: NDArray[numpy.float64],
+            repetition: Repetition | None = None,
+            annotations: annotations_t | None = None,
+            ) -> Self:
+        new = cls.__new__(cls)
+        new._string = string
+        new._offset = offset
+        new._repetition = repetition
+        new._annotations = annotations if annotations is not None else {}
+        return new
+
     def __copy__(self) -> Self:
         return type(self)(
             string=self.string,
diff --git a/masque/ref.py b/masque/ref.py
index 268d8d4..1d71432 100644
--- a/masque/ref.py
+++ b/masque/ref.py
@@ -86,6 +86,26 @@ class Ref(
         self.repetition = repetition
         self.annotations = annotations if annotations is not None else {}
 
+    @classmethod
+    def _from_raw(
+            cls,
+            *,
+            offset: NDArray[numpy.float64],
+            rotation: float,
+            mirrored: bool,
+            scale: float,
+            repetition: Repetition | None,
+            annotations: annotations_t | None,
+            ) -> Self:
+        new = cls.__new__(cls)
+        new._offset = offset
+        new._rotation = rotation % (2 * pi)
+        new._scale = scale
+        new._mirrored = mirrored
+        new._repetition = repetition
+        new._annotations = annotations if annotations is not None else {}
+        return new
+
     def __copy__(self) -> 'Ref':
         new = Ref(
             offset=self.offset.copy(),
diff --git a/masque/repetition.py b/masque/repetition.py
index 1e12fcd..9e8af26 100644
--- a/masque/repetition.py
+++ b/masque/repetition.py
@@ -113,6 +113,22 @@ class Grid(Repetition):
         self.a_count = a_count
         self.b_count = b_count
 
+    @classmethod
+    def _from_raw(
+            cls: type[GG],
+            *,
+            a_vector: NDArray[numpy.float64],
+            a_count: int,
+            b_vector: NDArray[numpy.float64],
+            b_count: int,
+            ) -> GG:
+        new = cls.__new__(cls)
+        new._a_vector = a_vector
+        new._b_vector = b_vector
+        new._a_count = int(a_count)
+        new._b_count = int(b_count)
+        return new
+
     @classmethod
     def aligned(
             cls: type[GG],