Architecture is an art and method of planning and designing. It has been developed by taking into consideration the social, economic, and cultural traces from different eras. Here are a few observations highlighting the differences between Indo-Islamic and Indian temple architecture. 

Temple Architecture

The Indian temple architecture, usually described as the Trabeate style, evolved over several centuries in different parts of India. The temples were adorned with images of living things. Swastika, padam, chakra, kalash, and other motifs are portrayed under the auspicious artwork. This architecture has two towers- Shikhara, a beehive-shaped curved tower, and Vimana, a pyramid-like central tower. Geographical, historical, climatic, racial, ethnic, and linguistic variations resulted in the diverse designs used in buildings in different regions.

Examples: Khajuraho Temples (Madhya Pradesh), Dilwara Temple (Mt. Abu, Rajasthan), etc.

Indo-Islamic Architecture

Indo-Islamic architecture on the other hand is a blend of Persian, Mesopotamian, Roman, Byzantine, and Indian designs. It is also referred to as the Mehrab style. The Indo-Islamic architecture is characterized by calligraphy and geometric patterns and spaces in the design are filled with domes, arches, mehrab, vaults, and some other structures. The interior design, geometric pattern, and courtyards were the primary focus of this architectural style. 

Examples: Taj Mahal (Agra), Char Minar (Hyderabad), etc.