I have heard about the concept ot Trimurti in Hinduism Wiki. One for construction (Brahma), one for protection (Vishnu) and one for destruction (Shiva). And somehow I feel it is related to Trinity in Christianism. Is there any relations?
One could do a great deal worse than quote another answer:
Each of the different views of the Trimuti within Hinduism falls into one or more of those camps. My analysis (based on Wikipedia) may not be complete, but I posit this:—
So: no, apart from both the Trinity and Trimurti being "three", there are no similarities. Specifically, the Trimurti denies that the three gods are wholly three and wholly one.
Trimurti and Trinity similarity: The number "Three"
Trimurti and Trinity differences:
Just as God is a Holy Trinity (Father, Son, Spirit), Satan also imitates God and creates the Unholy Trinity (Satan, Antichrist, False Prophet) at the end times (Revelation 12-13). An apologist Justin Martyr (100–165 AD) wrote that Satan always imitates God and His prophesies.
The Trimurti also could be one of the way of imitating God by Satan in order to make himself like God. Satan always wanted to become like God and that was the reason why Satan was cast out of Heaven (Isaiah 14:12-14)