There are temples present even now, where Maha Vishnu is worshiped in a pillar form. A well none example is the Kaliyuga Varadaraja Perumal Temple. It mentions the worship of Maha Vishnu, Mahalakshmi and Murugan.
The presence of temples dedicated to Maha Vishnu in pillar form, such as the Kaliyuga Varadaraja Perumal Temple, is a common theme. The temple's dedication to Maha Vishnu, Mahalakshmi, and Murugan highlights their significance within Hindu worship.