synthesis is an emerging and fascinating route for developing materials with a hierarchy in structure. Natural materials often have a sophisticated structure and inspire scientists to create inorganic materials replicating their features, which is difficult to attain through synthetic methodologies. Many plants and animal-based materials present in nature can be employed as bio-templates for structuring inorganic materials through a bottom-up approach. With this motivation, alumina, hydroxyapatite, and zinc-oxide ceramics have been developed with hierarchical structural features utilizing eggshell membrane (ESM) as bio-template. These ceramics are well-known for their potential applications and are widely studied. The above materials for the present study were chosen by considering that the capability of the ESM template to withstand different processing conditions could also be estimated during their synthesis. The fibrous network of ESM is replicated in the biomorphic ceramics, and the fibers are composed of an assembly of nanocrystallites that evolved through a bottom-up process directed by the ESM bio-macromolecules. The random aggregation of the nanocrystallites leads to the development of pores, and the developed ceramics are found to be mesoporous. These nanocrystallites form larger single crystal platelets and polyhedrons with the increase in calcination temperature. Single crystal platelets are formed at 1200 °C for biomorphic alumina ceramics. Oriented attachment growth, a non-classical crystal growth mechanism, is considered a plausible mechanism for the formation of α Al2O3 single crystal platelets. The nanocrystallites formed at lower calcination temperatures are the primary building units for the platelets. The amino acids of the ESMs acted as capping agents and controlled the crystal growth process through molecular-level interactions. The ESM is also found to be a successful template when subjected to rapid microwave heating for the synthesis of hydroxyapatite ceramics. The microwave processed hydroxyapatite has distinct morphological features compared to the conventionally processed one. During the development of biomorphic C-ZnO and C-ZnS ceramics, the ESM template acted as the intrinsic source of carbon and sulfur when calcined under argon atmosphere. The H2S vapor formed by the decomposition of sulfur-containing proteins of ESM reacted with ZnO and formed ZnS.