What is the connection between Shiv Sena and Shivaji park?

Mumbai's Shivaji park holds a lot of importance for Shiv Sena as it is the same place from where the journey of Shiv Sena began. Shivaji park is in Dadar area of Mumbai and this area is the core for Marathis. This was the park where Bal Thackeray first waved Shiv Sena's flag. Today, the Shivaji park is being decked up for the swearing-in ceremony of Uddhav Thackeray and his cabinet of ministers