When we enter the realm of quantum computing from the theoretical foundations, we encounter the enchanting world of complex algebra and quantum physics. The symbols and notions may look quite bewildering for a software engineer. I have encountered this during my numerous sessions on Quantum Computing for Software Engineers and Enterprise Architects. Based on this experience, I have put together a collection of essential building blocks of a Quantum Computer from a few useful architectural diagrams. Most of these diagrams are quite accessible and available for everyone in the internet. I have organised them in a logical and structured manner. These diagrams provide a layer wise and component based view of Quantum Computing Architectures. This is presented recently in the Women Who Code #WWC #Bangalore Chapter MeetUp held in VMWare on November 2018 for an engaging and interactive audience.