diff --git a/docs/reference/swe-glib/swe-glib-sections.txt b/docs/reference/swe-glib/swe-glib-sections.txt
index b475ba6..8be021c 100644
--- a/docs/reference/swe-glib/swe-glib-sections.txt
+++ b/docs/reference/swe-glib/swe-glib-sections.txt
@@ -60,6 +60,7 @@ gswe_moon_phase_data_get_type
 <SECTION>
 <FILE>gswe-sign-info</FILE>
 GsweSignInfo
+gswe_find_sign_info_by_id
 gswe_sign_info_new
 gswe_sign_info_ref
 gswe_sign_info_unref
@@ -79,6 +80,7 @@ gswe_sign_info_get_type
 <SECTION>
 <FILE>gswe-planet-info</FILE>
 GswePlanetInfo
+gswe_find_planet_info_by_id
 gswe_planet_info_new
 gswe_planet_info_ref
 gswe_planet_info_unref
@@ -122,6 +124,7 @@ gswe_planet_data_get_type
 <SECTION>
 <FILE>gswe-aspect-info</FILE>
 GsweAspectInfo
+gswe_find_aspect_info_by_id
 gswe_aspect_info_new
 gswe_aspect_info_ref
 gswe_aspect_info_unref
@@ -165,6 +168,7 @@ gswe_aspect_data_get_type
 <SECTION>
 <FILE>gswe-antiscion-axis-info</FILE>
 GsweAntiscionAxisInfo
+gswe_find_antiscion_axis_info_by_id
 gswe_antiscion_axis_info_new
 gswe_antiscion_axis_info_ref
 gswe_antiscion_axis_info_unref
@@ -206,6 +210,7 @@ gswe_antiscion_data_get_type
 <SECTION>
 <FILE>gswe-house-system-info</FILE>
 GsweHouseSystemInfo
+gswe_find_house_system_info_by_id
 gswe_house_system_info_new
 gswe_house_system_info_ref
 gswe_house_system_info_unref
diff --git a/src/swe-glib.c b/src/swe-glib.c
index d704d58..964278a 100644
--- a/src/swe-glib.c
+++ b/src/swe-glib.c
@@ -241,3 +241,98 @@ gswe_init(void)
     gswe_init_with_dir(PKGDATADIR);
 }
 
+/**
+ * gswe_find_planet_info_by_id:
+ * @planet: a planet ID registered with SWE-GLib
+ * @err: a GError
+ *
+ * Find the #GswePlanetInfo record registered with the id @planet.
+ */
+GswePlanetInfo *
+gswe_find_planet_info_by_id(GswePlanet planet, GError **err)
+{
+    GswePlanetInfo *ret = g_hash_table_lookup(gswe_planet_info_table, GINT_TO_POINTER(planet));
+
+    if (ret == NULL) {
+        g_set_error(err, GSWE_ERROR, GSWE_ERROR_UNKNOWN_PLANET, "Planet %d is not registered", planet);
+    }
+
+    return ret;
+}
+
+/**
+ * gswe_find_sign_info_by_id:
+ * @sign: a sign ID registered with SWE-GLib
+ * @err: a GError
+ *
+ * Find the #GsweSignInfo record registered with the id @sign.
+ */
+GsweSignInfo *
+gswe_find_sign_info_by_id(GsweZodiac sign, GError **err)
+{
+    GsweSignInfo *ret = g_hash_table_lookup(gswe_sign_info_table, GINT_TO_POINTER(sign));
+
+    if (ret == NULL) {
+        g_set_error(err, GSWE_ERROR, GSWE_ERROR_UNKNOWN_SIGN, "Sign %d is not registered", sign);
+    }
+
+    return ret;
+}
+
+/**
+ * gswe_find_house_system_info_by_id:
+ * @house_system: a house system ID registered with SWE-GLib
+ * @err: a GError
+ *
+ * Find the #GsweHouseSystemInfo record registered with the id @house_system.
+ */
+GsweHouseSystemInfo *
+gswe_find_house_system_info_by_id(GsweHouseSystem house_system, GError **err)
+{
+    GsweHouseSystemInfo *ret = g_hash_table_lookup(gswe_house_system_info_table, GINT_TO_POINTER(house_system));
+
+    if (ret == NULL) {
+        g_set_error(err, GSWE_ERROR, GSWE_ERROR_UNKNOWN_HSYS, "House system %d is not registered", house_system);
+    }
+
+    return ret;
+}
+
+/**
+ * gswe_find_aspect_info_by_id:
+ * @aspect: an aspect ID registered with SWE-GLib
+ * @err: a GError
+ *
+ * Find the #GsweAspectInfo record registered with the id @aspect.
+ */
+GsweAspectInfo *
+gswe_find_aspect_info_by_id(GsweAspect aspect, GError **err)
+{
+    GsweAspectInfo *ret = g_hash_table_lookup(gswe_aspect_info_table, GINT_TO_POINTER(aspect));
+
+    if (ret == NULL) {
+        g_set_error(err, GSWE_ERROR, GSWE_ERROR_UNKNOWN_ASPECT, "Aspect system %d is not registered", aspect);
+    }
+
+    return ret;
+}
+
+/**
+ * gswe_find_antiscion_axis_info_by_id:
+ * @antiscion_axis: an antiscion axis ID registered with SWE-GLib
+ * @err: a GError
+ *
+ * Find the #GsweAntiscionAxisInfo record registered with the id @antiscion_axis.
+ */
+GsweAntiscionAxisInfo *
+gswe_find_antiscion_axis_info_by_id(GsweAntiscionAxis antiscion_axis, GError **err)
+{
+    GsweAntiscionAxisInfo *ret = g_hash_table_lookup(gswe_antiscion_axis_info_table, GINT_TO_POINTER(antiscion_axis));
+
+    if (ret == NULL) {
+        g_set_error(err, GSWE_ERROR, GSWE_ERROR_UNKNOWN_ANTISCION_AXIS, "Antiscion axis system %d is not registered", antiscion_axis);
+    }
+
+    return ret;
+}
+
diff --git a/src/swe-glib.h b/src/swe-glib.h
index 318e5e5..adf1257 100644
--- a/src/swe-glib.h
+++ b/src/swe-glib.h
@@ -47,6 +47,7 @@
  * @GSWE_ERROR_UNKNOWN_PLANET: the referenced planet was not added with
  *                             gswe_moment_add_planet()
  * @GSWE_ERROR_UNKNOWN_ANTISCION_AXIS: the given axis is unknown to SWE-GLib
+ * @GSWE_ERROR_UNKNOWN_ASPECT: the given aspect is unknown to SWE-GLib
  *
  * Error codes returned by the SWE-GLib functions.
  */
@@ -61,6 +62,7 @@ typedef enum {
     GSWE_ERROR_UNKNOWN_SIGN,
     GSWE_ERROR_UNKNOWN_PLANET,
     GSWE_ERROR_UNKNOWN_ANTISCION_AXIS,
+    GSWE_ERROR_UNKNOWN_ASPECT,
 } GsweError;
 
 /**
@@ -74,6 +76,11 @@ typedef enum {
 GQuark gswe_error_quark(void);
 
 void gswe_init();
+GswePlanetInfo *gswe_find_planet_info_by_id(GswePlanet planet, GError **err);
+GsweSignInfo *gswe_find_sign_info_by_id(GsweZodiac sign, GError **err);
+GsweHouseSystemInfo *gswe_find_house_system_info_by_id(GsweHouseSystem house_system, GError **err);
+GsweAspectInfo *gswe_find_aspect_info_by_id(GsweAspect aspect, GError **err);
+GsweAntiscionAxisInfo *gswe_find_antiscion_axis_info_by_id(GsweAntiscionAxis antiscion_axis, GError **err);
 
 #endif /* __SWE_GLIB_H__ */