Editing Tanya (section)

== Igeres HaKodesh ==
The Tanya was first printed in 1797, but without the last two sections "Igeres HaKodesh" and "Kuntres Acharon" - only in the year after the Alter Rebbe's histalkus did his sons print the Tanya again and add these two final sections.

Over the following years, changes continued from one printing to another, and only in 1900 - when the Rebbe Rashab printed the Tanya for the yeshiva - was the Tanya "sealed" and sanctified in its final form familiar to us today.

One of the most significant changes in the 1900 printing was the addition of two Igros Kodesh (which weren't given their own siman but were added to existing ones): "Ha'osiyos haniglot eileinu" was added to siman 19, and "Migodel tirdosi" was added to siman 22.