A manastambha (Sanskrit for 'column of honour') is a pillar that is often constructed in front of Jain temples or large Jain statues.
In North India, they are topped by four Tirthankara images.
[1] According to the Digambara Jain texts like Adi Purana and Tiloyapannati, a huge manastambha stands in front of the samavasarana (divine preaching hall) of the tirthankaras, which causes someone entering a samavasarana to shed their pride.
[2] A monolithic manastambha is a standard feature in the Jain temples of Moodabidri.
They include a statue of Brahmadeva on the top as a guardian yaksha.