As mentioned in What does linga literally mean in Shiva Linga? post,
The pedestal shaped as the vagina and the phallus fixed therein are symbolical of the eternal creative forces personified as Śivā and Śiva.
The above mentioned form is found in most of the temples.
But before the story of Hāṭeśa, Shiva's Niṣkala (nameless and formless) aspect was just like a pillar which appeared in the Brahma-Vishnu conflict.
Is there any temple where Shiva is worshipped just as a pillar without any pedestal shaped as the vagina?