Background:
The ruler who erected a tower of victory at Mandu to commemorate his success of capturing Bundi and Ajmer was Mahmud of Gujarat. Mahmud Shah I, also known as Mahmud Begada, was a sultan of Gujarat Sultanate in India. He ruled from 1458 to 1511.

Explanation:
Mahmud's Military Campaigns:
During his reign, Mahmud Shah I launched several military campaigns to expand his kingdom. One of his notable military successes was the capture of Bundi and Ajmer. These conquests were significant as they further strengthened his control over the region.

Construction of the Tower of Victory:
To commemorate his victories and showcase his military prowess, Mahmud Shah I decided to erect a tower of victory at Mandu. Mandu, located in present-day Madhya Pradesh, was the capital city of the Malwa Sultanate. The tower, known as the "Tower of Victory" or "Vijay Stambha," was built in the early 16th century.

Architectural Significance:
The Tower of Victory is a magnificent structure that stands tall as a symbol of Mahmud Shah I's military achievements. It is an excellent example of Indo-Islamic architecture, blending elements of Hindu and Islamic styles. The tower is adorned with intricate carvings and inscriptions, showcasing the artistic and architectural skills of the time.

Features of the Tower:
The Vijay Stambha is around 37 meters tall and consists of several levels or stories. Each level is adorned with beautifully carved sculptures and motifs. The tower is built in the Solanki style, with balconies and balconettes on each level. The intricate carvings depict scenes from Hindu mythology, as well as historical events and figures.

Symbol of Power:
The construction of the Tower of Victory was not only a testament to Mahmud Shah I's military successes but also a symbol of his power and authority. It served as a reminder to his subjects and rivals of his dominance and the might of the Gujarat Sultanate.

Conclusion:
Mahmud Shah I, the ruler of Gujarat Sultanate, built the Tower of Victory at Mandu to commemorate his conquests of Bundi and Ajmer. This architectural marvel stands as a testament to his military achievements and continues to be a significant tourist attraction in present-day Madhya Pradesh.