Question: The fictional deity Sigmar Heldenhammer is the patron deity of this faction whose cultures are based on what real-world empire?

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Gramadevata: Gramadevata (Sanskrit: ग्रामदेवता; "Village deity") is a Sanskrit term for the presiding deity or guardian deity (patron deity) in Hindu villages, towns and cities.  It is derived from the words "grāma" “village” and "devatā" “deity”.  Traditionally Kal Bhairav, a fierce form of Lord Shiva is the "Gramadevata" in the rural villages of Maharashtra and Tamil Nadu, where he is referred to as "Vairavar".

Edapally Ganapathi temple: Edapally Maha Ganapathi temple is well known as Edappally Kovilakam Temple, The Mahaganapathy Temple is one of the most important Ganapathy temples in the state visited by devotees from all over the state.  This is the part of Edappaly Rajas.  The deity here is the patron deity of the Edappally Royal Family.  The Temple is constructed at the Middle of the forecourts of Edappally Swaroopam and faces to east.  It is situated near Edappilly High School Bus Stop.  Visiting time in the morning is between 5.00 and 7.30AM.  The members of Edappally royal family worship after these hours, since it is their family temple.  During the evening time also the temple is kept opened.

The Empire (Warhammer): In Games Workshop's "Warhammer Fantasy" fictional universe, The Empire is one of the human political factions and armies, and is featured in many games and novels.  In terms of location, language, culture, and society, it is clearly based on the real-world medieval Holy Roman Empire.

Xuanwu (god): Xuánwǔ (玄武 "Dark Warrior" or "Mysterious Warrior") or Xuándì (玄帝 "Dark Deity"), also known as Zhēnwǔ (真武) or Zhēnwǔdàdì (真武大帝 "True Warrior Great Deity"), is a deity in Chinese religion, and one of the higher-ranking deities in Taoism.  He is revered as a powerful god, able to control the elements and capable of great magic.  He is identified as the god of the north "Hēidì" (黑帝 "Black Deity") and is particularly revered by martial artists.  He is the patron deity of Hebei, Manchuria and Mongolia.  As some Cantonese and Southern Min speakers (particularly Hokkien) fled into the south from Hebei with the Song dynasty, Xuanwu is also widely revered in Fujian and Guangdong as well as among the Chinese diaspora.

Kunapipi: In Australian aboriginal mythology, Kunapipi is a mother goddess and the patron deity of many heroes.  She gave birth to human beings as well as to most animals and plants, and Mother Goddess and patron deity of many heroes.  The mother goddess of the aboriginal tribes of northern Australia.  Now a vague, otiose, spiritual being, ‘the old woman’ once travelled across the land with a band of heroes and heroines, and during the ancestral period she gave birth to men and women as well as creating the natural species.  A ‘rainbow serpent’ went before in order to prepare her way

Huitzilopochtli: In the Aztec religion, Huitzilopochtli (,    ), is a Mesoamerican deity of war, sun, human sacrifice and the patron of the city of Tenochtitlan.  He was also the national god of the Mexicas, also known as Aztecs, of Tenochtitlan.  Many in the pantheon of deities of the Aztecs were inclined to have a fondness for a particular aspect of warfare.  However, Huitzilopochtli was known as the primary god of war in ancient Mexico.  Since he was the patron god of the Mexica, he was credited with both the victories and defeats that the Mexica people had on the battlefield.  The people had to make sacrifices to him to protect the Aztec from infinite night.  It is important to remember that the defeat of their patron deity meant the defeat of his people.  This is one of the many reasons why they were concerned with providing exquisite tribute and food for him.  Not only was it important for him to survive his battles, but the fate of the Mexican people would have rested in the victory of Huitzilopochtli.  He wielded Xiuhcoatl as a weapon, associating him with fire.

Khandoba: Khandoba (Marathi: खंडोबा , IAST: Khaṇḍobā), Martanda Bhairava or Malhari, is a Hindu deity worshipped as a manifestation of Shiva mainly in the Deccan plateau of India, especially in the states of Maharashtra and Karnataka.  He is the most popular Kuladaivat (family deity) in Maharashtra.  He is also the patron deity of select warrior, farming, herding and Brahmin (priestly) castes as well as several of the hunter/gatherer tribes that are native to the hills and forests of this region.  The cult of Khandoba has linkages with Vaishnava and Jain traditions, and also assimilates all communities irrespective of caste, including Muslims.  The worship of Khandoba developed during the 9th and 10th centuries from a folk deity into a composite god possessing the attributes of Shiva, Bhairava, Surya and Karttikeya (Skanda).  He is depicted either in the form of a Lingam, or as an image of a warrior riding on a bull or a horse.  The foremost centre of Khandoba worship is Jejuri in Maharashtra.  The legends of Khandoba, found in the text "Malhari Mahatmya" and also narrated in folk songs, revolve around his victory over demons Mani-malla and his marriages.

Mixcoatl: Mixcoatl (Nahuatl: "Mixcōhuātl" , ] from mixtli ] "cloud" and cōātl ] "serpent"), or Camaztle ] from camaz "deer sandal" and atle "without". , or Camaxtli, was the god of the hunt and identified with the Milky Way, the stars, and the heavens in several Mesoamerican cultures.  He was the patron deity of the Otomi, the Chichimecs, and several groups that claimed descent from the Chichimecs.  While Mixcoatl was part of the Aztec pantheon, his role was less important than Huitzilopochtli, who was their central deity.  Under the name of Camaxtli, Mixcoatl was worshipped as the central deity of Huejotzingo and Tlaxcala.

Sigmar: Sigmar Heldenhammer is a fictional deity in the "Warhammer Fantasy" setting.  He is the patron deity of The Empire.  Before he became a god, Sigmar was a man, albeit an exceptional, perhaps even superhuman one.  The young chieftain of the Unberogens who lived 2,500 years before the present day of the Warhammer universe, he united the barbarian human tribes into what would become the mightiest human nation – the Empire.  His sign is a twin-tailed comet or a war hammer.

Sigmar (disambiguation): Sigmar is a fictional deity in the "Warhammer Fantasy" setting.

Supporting paragraphs: Sigmar The Empire (Warhammer)
Answer: Holy Roman Empire