diff --git a/.obsidian/plugins/various-complements/histories.json b/.obsidian/plugins/various-complements/histories.json
index b3bb650..1ae12c4 100644
--- a/.obsidian/plugins/various-complements/histories.json
+++ b/.obsidian/plugins/various-complements/histories.json
@@ -1 +1 @@
-{"studied":{"studied":{"currentFile":{"count":1,"lastUpdated":1732902129152}}},"History":{"History":{"currentFile":{"count":1,"lastUpdated":1733161472463}}},"historical":{"historical":{"currentFile":{"count":1,"lastUpdated":1733161505181}}},"events":{"events":{"currentFile":{"count":1,"lastUpdated":1733161507343}}},"intervention":{"intervention":{"currentFile":{"count":1,"lastUpdated":1733161512207}}},"invention":{"invention":{"currentFile":{"count":1,"lastUpdated":1733161517029}}},"gradual":{"gradual":{"currentFile":{"count":1,"lastUpdated":1733161523429}}},"divide":{"divide":{"currentFile":{"count":1,"lastUpdated":1733161561862}}}}
\ No newline at end of file
+{"studied":{"studied":{"currentFile":{"count":1,"lastUpdated":1732902129152}}},"History":{"History":{"currentFile":{"count":1,"lastUpdated":1733161472463}}},"historical":{"historical":{"currentFile":{"count":1,"lastUpdated":1733161505181}}},"events":{"events":{"currentFile":{"count":1,"lastUpdated":1733161507343}}},"intervention":{"intervention":{"currentFile":{"count":1,"lastUpdated":1733161512207}}},"invention":{"invention":{"currentFile":{"count":1,"lastUpdated":1733161517029}}},"gradual":{"gradual":{"currentFile":{"count":1,"lastUpdated":1733161523429}}},"divide":{"divide":{"currentFile":{"count":1,"lastUpdated":1733161561862}}},"historians":{"historians":{"currentFile":{"count":1,"lastUpdated":1733162394642}}},"European":{"European":{"currentFile":{"count":1,"lastUpdated":1733162425591}}},"thought":{"thought":{"currentFile":{"count":1,"lastUpdated":1733162447174}}},"Agree":{"Agree":{"currentFile":{"count":1,"lastUpdated":1733162452692}}},"Renaissance":{"Renaissance":{"currentFile":{"count":1,"lastUpdated":1733162464198}}},"chronology":{"chronology":{"currentFile":{"count":1,"lastUpdated":1733162474220}}},"Pre-modern":{"Pre-modern":{"currentFile":{"count":1,"lastUpdated":1733162481516}}},"history":{"history":{"currentFile":{"count":1,"lastUpdated":1733162520801}}},"constructed":{"constructed":{"currentFile":{"count":1,"lastUpdated":1733162542410}}}}
\ No newline at end of file
diff --git a/UNB/Year 5/Semester 1/HIST1001/In class notes.md b/UNB/Year 5/Semester 1/HIST1001/In class notes.md
index e2994c4..ebc8902 100644
--- a/UNB/Year 5/Semester 1/HIST1001/In class notes.md	
+++ b/UNB/Year 5/Semester 1/HIST1001/In class notes.md	
@@ -686,3 +686,10 @@ Prehistory vs History
 - A divide driven by what we (can) know, not by large historical events 
 - The invention of writing is a small gradual process (3200 BCE is one date)
 - The people either side of writing ...
+Historical Eras 
+- Eras are constructed by historians studying the past:
+	- Eras defined by great people: The Augustan Age, The Victorian Era 
+	- Eras defined by technical innovation or thought: The Information Age, Renaissance 
+	- Eras defined by relative chronology: Pre-modern, BCE/BC
+	- Eras defined by what we know: Pre-history
+- When we study history we should think critically about how the eras we use are constructed.